Justin Is Trying to Decide Which Nutritional Supplement He Should

Multiple Choice

Justin is trying to decide which nutritional supplement he should buy if he wants to gain muscle mass as quickly as possible. He sees lots advertised online but isn't sure which ones actually work. From a scientific approach, Justin should make a decision about which one to buy based on

A) what his friends use.
B) what the trainers at the local gym suggest.
C) empirical evidence.
D) what the people working out at the local gym use.
E) price.