A person that is using amino acids as a source of energy is probably:

A) Starving and doing what it can to get energy

B) Involved with competitive inhibition

C) Needing energy for the brain

D) Using a high energy sourse instead of carbohydrates

A) Starving and doing what it can to get energy

Explanation:

The body uses carbohydrates and fat as main energy source. Aminoacids are used as energy source on a high protein diet as its exceds the amount needed for protein synthesis, or on starvation. In this second case, the aminoacids comes from the degradation of muscle proteins.