City Planners in Detroit hope that the renewal project extending along the eastern riverfront will establish a population that lives and works downtown and also provides the office space needed to attract new businesses.

A) that lives and works downtown and also provides
B) to live and work downtown and also provide
C) that lives as well as works downtown and also provide
D) which lives as well as works downtown and also provides
E) who live as well as work downtown and also provides

GmatKiss wrote:City Planners in Detroit hope that the renewal project extending along the eastern riverfront will establish a population that lives and works downtown and also provides the office space needed to attract new businesses.

A) that lives and works downtown and also provides
B) to live and work downtown and also provide
C) that lives as well as works downtown and also provide
D) which lives as well as works downtown and also provides
E) who live as well as work downtown and also provides

IMO B

GmatKiss wrote:Modern producers, when they need reliable sources of original equipments and technologically advanced components to operate profitably, face increasingly difficult choices of owning the producers of these items, a practice known as backward integration and buying from independent manufacturers

A. Modern producers, when they need reliable sources of original equipments and technologically advanced components to operate profitably, face increasingly difficult choices of owning the producers of these items, a practice known as backward integration and buying from independent manufacturers - a practice known ... integration should be non essential modifier.

B. Modern producers, who need reliable sources of original equipments and technologically advanced components to operate profitably, face an increasingly difficult choice between owning the producers of these items, a practice known as backward integration, and buying from independent manufacturers

C. Modern producers, who need reliable sources of original equipments and technologically advanced components to operate profitably, face an increasingly difficult choice to either own the producers of these items, and to buy from independent manufacturers, a practice known as backward integration

D. Needing reliable sources of original equipment supplies, and technologically advanced components to operate profitably, modern producers facing an increasingly difficult choice of owning the producers of these items, and buying from independent manufacturers, a practice known as backward integration - misplaced modifier

E. Modern producers practice what is known as backward integration, when they need reliable sources of original equipment supplies and technologically advanced components to operate profitably, and to face an increasing and difficult choice of owning between the producers of these items and buying from independent manufacturers

IMO B

GmatKiss wrote:City Planners in Detroit hope that the renewal project extending along the eastern riverfront will establish a population that lives and works downtown and also provides the office space needed to attract new businesses.

A) that lives and works downtown and also provides
B) to live and work downtown and also provide
C) that lives as well as works downtown and also provide
D) which lives as well as works downtown and also provides
E) who live as well as work downtown and also provides

A/D/E - provides is not parallel with establish
B - to live and work seems to modify City planners.
C employs right parallelism - will establish ... and also provide, the usage of that refers rightly to population.

IMO C

population is singular or plural?

GmatKiss wrote:
City Planners in Detroit hope that the renewal project extending along the eastern riverfront will establish a population that lives and works downtown and also provides the office space needed to attract new businesses.

A) that lives and works downtown and also provides
B) to live and work downtown and also provide
C) that lives as well as works downtown and also provide
D) which lives as well as works downtown and also provides
E) who live as well as work downtown and also provides

The correct answer should be C as explained above.

Population is singular not plural. But here do not get confused. The population is not providing the space, the project has to establish the population and provide office space.

Hope that clears your doubt.

Modern producers, when they need reliable sources of original equipments and technologically advanced components to operate profitably, face increasingly difficult choices of owning the producers of these items, a practice known as backward integration and buying from independent manufacturers

A. Modern producers, when they need reliable sources of original equipments and technologically advanced components to operate profitably, face increasingly difficult choices of owning the producers of these items, a practice known as backward integration and buying from independent manufacturers

B. Modern producers, who need reliable sources of original equipments and technologically advanced components to operate profitably, face an increasingly difficult choice between owning the producers of these items, a practice known as backward integration, and buying from independent manufacturers

C. Modern producers, who need reliable sources of original equipments and technologically advanced components to operate profitably, face an increasingly difficult choice to either own the producers of these items, and to buy from independent manufacturers, a practice known as backward integration

D. Needing reliable sources of original equipment supplies, and technologically advanced components to operate profitably, modern producers facing an increasingly difficult choice of owning the producers of these items, and buying from independent manufacturers, a practice known as backward integration

E. Modern producers practice what is known as backward integration, when they need reliable sources of original equipment supplies and technologically advanced components to operate profitably, and to face an increasing and difficult choice of owning between the producers of these items and buying from independent manufacturers

In A, when is an incorrect modifier.
B is correct
C has either but does not have an or
D and E have change the meaning of the sentence by using the "backward integration" term at incorrect places.

1st Question :

Choice between is the correct idiom. Period.

2nd Question :

The project "will establish", the project "provides"
The population - "lives" and "works"
Mind you - population can be singular or plural. But the context states it as a group (Collective), so use singular nouns.

Looks for the answer choice with the above three green (correct) verb forms, and you will end up with (A) or (D)

IMO : (A)

HTH!