a commuter rail system

[sogmat]

Because the population is denser there and the automobile is therefore inefficient as a means of transportation, a commuter rail system serving a given population is usually five times more efficient in a European city than it is in an American city.
A serving a given population is usually five times more efficient in a European city than it is in an American city

B serving a given population will usually be five times more efficient if it is placed in a European city instead of an American city

C will usually be five times more efficient in a European city than one serving a comparable population in an American city

D in a European city will usually be five times more efficient than will a system serving a comparable population in an American city

E that is implemented in a European city will usually be five times more efficient than if it is implemented with a comparable population in an American city


oa d

[vivek.kapoor83]

IMO D'
coz commuter rail system is for european cities, so these 2 should be as near as possible
ABC looks akward
E - out coz by adding 'that' it means that a specific system
So choose D.

[tanviet]

this question is similar to Q 199 in OG 10, very hard one

b is wrong because there is not "than"

a,c,e,are wrong because "it" refer to the same system and so not logic

"it" is a COREFFERENT, Pls, review this concept in grammar book

very hard one,

[amitabhprasad]

this question is similar to Q 199 in OG 10, very hard one

b is wrong because there is not "than"

a,c,e,are wrong because "it" refer to the same system and so not logic

"it" is a COREFFERENT, Pls, review this concept in grammar book

very hard one,

I don't see use of "it" in "C"

[tanviet]

C is wrong because there is not "will"