Which is the best definition of anabolic steroids?
A.
a synthetic version of the hormone testosterone
B.
a vitamin supplement that increases muscle mass
C.
a prescribed medicine that helps athletes recover from injuries

A.  a synthetic version of the hormone testosterone

Explanation:

According to www.drugabuse.gov, ""Anabolic" refers to muscle building, and "androgenic" refers to increased male sex characteristics."

When on the synthetic version of testosterone, the body gains a lot of muscle mass. A good way to see the changes brought on by testosterone are looking at before and after photos of FtM patients.