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Question
Researchers who followed a large, representative sample of U.S. youths from ages 9 to 17 found that
A)daily free-time physical activity declined with age, more so for girls than boys.
B)at every age, a majority of participants engaged in regular exercise outside of school hours.
C)daily free-time physical activity increased for both sexes until age 13, then declined.
D)throughout adolescence, girls exceeded boys in regular daily exercise.
Answer
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