I do not know the answer choices, but I will tell you what is known for dieting.
Diets are ineffective because you aren't actually changing your eating habits. As soon as you lose a certain amount of weight, you go back to eating like you did before. You may lose 5 pounds, but you will most likely gain it back.
Also, diets are often a sham and a waste of your time. Many who don't eat enough of what they need may lose weight, but you also lose key nutrition - which results in lethargy and other side effects.
Please be more specific for a proper answer, though.
