The Hymen

The hymen:

A) completely blocks the opening into the vagina from birth to first intercourse.
B) can be torn only during intercourse; it is designed not to be affected by activities such as horseback riding and inserting a tampon.
C) cannot be used as proof of virginity as not all women experience tearing at first intercourse.
D) is responsible for secreting female sex hormones such as estrogen and progesterone.