An Adult Male Has Male Pattern Baldness on the Vertex

An adult male has male pattern baldness on the vertex of his head and has been using Rogaine for two months. He asks how effective minoxidil (Rogaine) is. Minoxidil:

A) Provides a permanent solution to male pattern baldness if used for at least four months
B) Will show results after four months of twice-a-day use
C) May not work for his type of baldness
D) Works better if he also uses hydrocortisone cream daily on his scalp