Since the Earlier Kinsey Studies, How Have Rates of Oral

Since the earlier Kinsey studies, how have rates of oral sex among teenagers changed?

A) Rates of oral sex have decreased and been replaced by higher levels of intercourse.
B) Rates of oral sex have remained constant between the years of the Kinsey studies and the more recent National Survey of Sexual Health and Behavior.
C) Rates of oral sex have increased according to results of the National Survey of Sexual Health and Behavior.
D) Rates of receiving oral sex for males have remained constant while rates of receiving oral sex for females have increased dramatically.