Compare and contrast the differences in a person's cardiovascular fitness between an exercise program that utilizes the progression principle and one that does not.

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.

hope this helps

What are the options?

Ithink it’s ritalin