Because the population is denser there and the auto mobile 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

Source: Princeton Review