If the Doctor Uses a Test That Indicates If a Man

Multiple Choice

If the doctor uses a test that indicates if a man is having nighttime erections, what is he likely checking for?

A) if the man's ED should be classified as a lifelong sexual dysfunction or an acquired sexual dysfunction
B) if the man's ED is more likely to have a physiological vs. a psychological cause
C) if the man's ED can be effectively treated with a drug like Viagra
D) if the man's ED is situational or generalized