A Female Patient Tells the Nurse That It Was Discovered

A female patient tells the nurse that it was discovered that her inability to become pregnant is due to her husband's choice of underwear. The nurse understands which of the following?

A) Tight male underwear inhibits sperm production.
B) Tight male underwear impedes blood flow to the penis.
C) Tight underwear may increase heat in the genital area.
D) The patient is repeating an "old wives' tale."