Answer :
I personally really do not think it is B, drinking so much juice, I don't think it is really healthy, I think D is the correct answer, it makes most sense to me.
A) although protein is essential for the body. But too much of it leads to liver and heart problem. B) Well it is said that 1 glass of juice is just okay for the body. Too much vitamins is not needed. But when you take excess of juice, it causes diarrhea. C) Is totally off point. It makes no sense at all. Now here comes D) Healthy food makes us grow, think faster and keep us fit. Not eating junk food and all that stuffs. So, the answer to your question is D.