which activity would not provide the recommended level of moderate physical activity each day?

a. taking the stairs instead of riding the elevator

b. jogging or skateboarding to your friend’s house

c. exercising while watching tv

d. cleaning the house and going grocery shopping

D.. cleaning the house is something we do daily

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)