What Does the Nurse Emphasize When Counselling a Client About

What does the nurse emphasize when counselling a client about he use of sildenafil (Viagra) ?

A) May be beneficial for his female sexual partner as well.
B) Results in less satisfying intercourse than might have been enjoyed previously.
C) Is not effective if the cause of erectile dysfunction is psychological.
D) elicits an erection in an impotent male.