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


***********************************************************
His campaign for sanitary conditions in operating rooms finally successful, Sir Joseph Lister lent his name to the company that developed Listerine, the first antibacterial liquid.





His campaign for sanitary conditions in operating rooms finally successful



Since his campaign for sanitary conditions in operating rooms had been eventually successful



Because of the eventual success of his campaigning for sanitary conditions in operating rooms



His campaign for sanitary conditions in operating rooms being eventually successful



Campaigning, eventually successfully, for conditions to be sanitary in operating rooms