求助一道逻辑单题

Benovians set their clocks back an hour for the winter. The result is that, during winter’s short days,
it is light when most commuters drive to work, but dark when they drive back home. Darkness
contributes to accidents. Changing the clocks, however, does not actually increase the amount of
driving done in the dark, so it is unlikely to have any effect on Benovia’s automoile accident rate.
1. Which of the following is an assumption on which the argument relies?
A. The average number of hours that Benovians drive when it is dark is greater for days during the
winter than for days during other times of the year.
B. In Benovia, hazards to safe driving that are made worse by darkness are as likely to occur in the
morning as in the evening.
C. The majority of cars on Benovia’s roads during a given day are those of people commuting to or
from work.
D. The majority of automobile accidents in Benovia take place when it is dark.
E. Driving conditions are no worse in Benovia in the winter than during the rest of the year.
敢问这个题应该怎么分析，有点懵住了……