When Do Both Bulimia Nervosa and Anorexia Nervosa Typically Begin

When do both bulimia nervosa and anorexia nervosa typically begin?

A) before a school dance, primarily in high school
B) immediately upon the beginning of puberty, when bodies change and begin taking on a more adult form
C) upon entry into college, when fear of the "freshman fifteen" becomes overwhelming
D) after a period of intense dieting that has been successful and has earned praise from family members and friends