Participate in a variety of activities that develop health-related physical fitness activities including aerobic exercise to develop cardiovascular efficiency

Your answer would be false

Its either c or d. i would go with d though, because im not sure if its legal in all of the us

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)