Which of the following statements concerning cancer is true? a. cancer cells multiply at a rate that is beneficial to the human body. b. cancer is caused primarily by bacterial infections. c. cancer is the uncontrolled growth of foreign cells in the body. d. cancer is the uncontrolled growth of human cells in the body.

Ibelieve is scabies

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)