Multiple Choice
Kipsigis infants of Africa do not sleep for periods greater than 3 hours for the first 8 months of life; however, 8-month-old infants in the United States may sleep for as long as 8 hours at a time. This difference is the result of __________.
A) culture
B) genes
C) personality
D) brain development
Correct Answer:

Verified
Correct Answer:
Verified
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