Which of the Following Statements Is True Regarding What Social

Which of the following statements is true regarding what social factors are predictive of early intercourse?

A) Drinking alcohol at age 12 or 13 is associated with having early intercourse for boys.
B) Boys with weak self-concepts are more likely to engage in early intercourse.
C) Girls with strong self-concepts are more likely to engage in early intercourse.
D) Both boys and girls who begin smoking by age 12 or 13 are more likely to have intercourse at an early age.