Three Chronic Marijuana Users-A Light User, a Moderate User, and a Heavy

Multiple Choice

Three chronic marijuana users-a light user, a moderate user, and a heavy user-stop using marijuana. Before quitting, all three experienced abnormal blood flow in their brains. Several weeks later, blood flow in their brains had MOST likely:

A) returned to completely normal flow levels for all three.
B) returned to completely normal flow levels for the light and moderate users only.
C) returned to nearly normal for the light and moderate users only but remained at abnormal levels for the heavy user.
D) returned to nearly normal for all three.