Jenny Is 22 and Slightly Overweight, and Is Attempting to Lose

Jenny is 22 and slightly overweight, and is attempting to lose weight by following the grapefruit diet. As her nurse, you would tell her that:

A) a balanced diet and activity are more important in losing weight.
B) fad diets and supplements usually work.
C) quick dietary results from diets such as hers are good.
D) the grapefruit diet will give her a jumpstart to a healthful diet.