Sentence Correction

Hi,

I came across two SC problems and don't fully understand the correct answers. Can any one help.

Question 1. The correct answer is B

The company is fortunate to have excellent relationships among its employees: they each have a relationship of respect for all the others.

A
they each have a relationship of respect for all the others

B
they have respect for one another

C
each one has respect for one another

D
they each have a relationship of respect for each other

E
they and the others respect each other

Question 2. The correct answer is D.

In a state of pure commercial competition, there would be a large number of producing firms, all unfettered by governmental regulations, all seeking to meet consumer needs and wants more successfully than each other.

A
all seeking to meet consumer needs and wants more successfully than each other

B
all seeking more successfully to meet consumer needs and wants than the others

C
each seeking to meet consumer needs and wants more successfully than one another

D
each seeking to meet consumer needs and wants more successfully than the others

E
each seeking more successfully to meet consumer needs and wants than another