One reason westward travel is less disruptive of the circadian than eastward travel is that it is easier to ___ than to ___.
a. go to sleep later; go to sleep when you are not sleepy
b. go to sleep early; go to sleep later
c. sleep during the day; stay awake when it's dark
d. go to sleep early; go to sleep when you are used to
Question 2
The main difference between the original Head Start Program and the Abecedarian Project is the:
a. Age at which the program begins
b. The socioeconomic status of the students
c. The genetic similarity of the students
d. None of the above
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