Match Each Statement with the Correct Item Below

Match each statement with the correct item below:
-ergogenic aid

A) in their role as energy regulators, contribute to the production of energy within the body
B) has proven to be effective as a treatment for osteoarthritis
C) any agent that enhances energy utilization, including energy production and efficiency
D) some of the oldest medicines
E) organic (carbon-containing) compounds that are essential in small amounts for body processes