A Man Is Told by the Doctor to Reduce the Frequency

A man is told by the doctor to reduce the frequency of sexual activity in his marriage,in order to avoid illness.What era is this man most likely living in?

A) the Colonial era
B) the ear of the early fur trade (i.e.16^th and 17^th centuries)
C) the 19^th century
D) the late 20^th century
E) 5^th century B.C.Athens