12. A public-service advertisement advises that people who have consumed alcohol should not drive until they can do so safely. In a hospital study, however, subjects questioned immediately after they consumed alcohol underestimated the time necessary to regain their driving ability. This result indicates that many people who drink before driving will have difficulty following the advertisement’s advice.

Which of the following, if true, most strongly supports the argument above?

(A) Many people, if they plan to drink alcohol, make arrangements beforehand for a nondrinker to drive them home.

(B) The subjects in the hospital study generally rated their abilities more conservatively than would people drinking alcohol outside a hospital setting.

(C) Some people refrain from drinking if they will have to drive to get home afterward.

(D) The subjects in the hospital study were also questioned about the time necessary to regain abilities that do not play an important role in driving safely.（B）

(E) Awareness of the public-service advertisement is higher among the general population than it was among the subjects in the hospital study.

选b 逻辑是否是这样：subjects在估计自己的能力时较医院外的人要保守，所以他们认为自己的恢复能力已经够长但其实他们还没有到safe的时间，所以医院外的人喝了酒之后会认为他们需要恢复的时间会更短。请指教！