Marwan, Who Is 56 and About 60 Pounds Overweight, Tells

Marwan, who is 56 and about 60 pounds overweight, tells his doctor he recently began having difficulty sustaining an erection until orgasm. Marwan's doctor most likely will:

A) prescribe a SSRI for Marwan.
B) educate Marwan about the stop-start technique.
C) advise Marwan to lose weight and increase exercise.
D) refer Marwan to a surgeon to have a vacuum pump implanted in his penis.