To conform to dietary guidelines set for Americans, the principal source of energy should be from foods high in
A. complex carbohydrates.
B. fat.
C. protein. D. water.

Respuesta :

I believe that the answer would be D., Water.


Water gives you alot of energy, believe it or not. If you 
were not to drink water for days, you will feel very lazy 
and down.


Hope this helps!