PT 59 S3 Q4

On a short trip a driver is more likely to have anaccident if there is ... ...

Which one of the following, if true, most helps to explain the facts described above?
(A) People are much more likely to drive alone on short trips than on long trips.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-B, Dec. '09 LSAT (PT 59 Sec. 3)