Multiple Choice
In a U.S. national survey conducted in 2009, _____ percent of twelfth-graders reported that they had experienced sexual intercourse, compared with _____ percent of ninth-graders.
A) 20; 10
B) 62; 32
C) 77; 90
D) 60; 52
Correct Answer:

Verified
Correct Answer:
Verified
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