A Patient Is Being Discharged from Hospital Seven Days Post

A patient is being discharged from hospital seven days post myocardial infarction. He is curious to know why he must wait six weeks before having sexual intercourse. What is the best response by the nurse to this question?

A) "You need to regain your strength before attempting such exertion."
B) "When you are able to climb two flights of stairs comfortably, it is generally safe to have sex."
C) "Have a glass of wine to relax you, before you can try to have sex."
D) "If you can maintain an active regular morning walks, your risk will decrease."