Obesity, Bulimia Nervosa, and Anorexia Nervosa Are Alike in That

Obesity, bulimia nervosa, and anorexia nervosa are alike in that

A) all are difficult to treat and may be caused by a number of factors.
B) all involve eating far less than is required for the body to function.
C) all involve vomiting or purging after eating.
D) in all cases the person is actually starving to death regardless of their outside appearance.
E) in all cases the person is on a very restrictive diet.