The best way to avoid sexually transmitted diseases is to practice abstinence.
A.
True
B.
False

A. True

Explanation:

This is the only 100% guaranteed way.

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.