When Recommending an Over-The-Counter Topical Medication to Treat a Dermatologic

When recommending an over-the-counter topical medication to treat a dermatologic condition, which instruction to the patient is important to enhance absorption of the drug?

A) Apply a thick layer of medication over the affected area.
B) A solution spray preparation will be more effective on hairy areas.
C) Put cool compresses over the affected area after application.
D) Use a lotion or cream instead of an ointment preparation.