题目选项分析

Laws requiring the use of headlights during daylight hours can prevent automobile collisions. However,since daylight visibility is worse in countries farther from the equator, any such laws would obvisouly be moreeffective in preventing collisions in those countries. In fact, the only countries that actually have such laws arefarther from the equator than is the continental United States.

Which of the following conclusions could be most properly drawn from the information given above?

【选项】In many countries that are farther from the equator than is the continental United States poor daylight visilibty is the single most important factor in automobile collisions.