In the U.S., evidence that daylight affects human circadian rhythms is supported by the observation that even though everyone's time keepers (clocks, phone) report the same time, people in the western part of the time zone go to bed _______ people in the in eastern part of the time zone.
A) much earlier than
B) slightly earlier than
C) a bit later than
D) at the time as

Question

Quizplus · Accepted Answer

The question is asking about how daylight affects human circadian rhythms in different parts of a time zone. The fact that people in the western part of a time zone go to bed a bit later than people in the eastern part of the same time zone suggests that daylight is affecting their internal clocks, causing them to feel less sleepy earlier in the evening. Therefore, the best choice is C, "a bit later than."

In the US, Evidence That Daylight Affects Human Circadian Rhythms Is Supported