The notion of a diffusion of responsibility is most usually applied to the study of: a) social influence. b) prosocial behavior. c) aggression. d) group decision making.

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)

Where are the following