Which Statement Most Accurately Reflects a Legitimate Concern About Anal

Which statement most accurately reflects a legitimate concern about anal sex?

A) Even in couples with no history of sexually transmitted disease, anal intercourse can cause serious infections.
B) Anal intercourse is unnatural and morally unacceptable behavior for all human beings.
C) Anal intercourse is acceptable for homosexual males but not appropriate for heterosexual couples.
D) Oral-anal activity can carry serious health risks.