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!
The overload princiole could make this workout more challenging as this is a full body workout and the point of overload is to push ur body until you cant do anymore which will cause you to achieve strength and muscle mass faster than small workouts. this specifically is good because its a full body workout and you will push your body to the best of its abilities. Hope this helped !!
I think veritables would be considered nutrient dense