Which best describes abstinence? refusing to date romantically avoiding certain kinds of sexual activity dating people who are able to consent to sex refusing to engage in all forms of sexual activity

Your answer would be D, refusing to engage in all forms of sexual activity.

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)