An Adolescent Patient Who Is on the School Swim Team

An adolescent patient who is on the school swim team asks a nurse about ways to prevent swimmer's ear. The nurse will tell the patient to:

A) allow the ears to drain well after every swim and shower.
B) clean the ears with a cotton-tipped applicator after swimming.
C) keep the ear canals free of cerumen.
D) use antifungal ear drops before and after swimming.