You are working with a client who weighs 180 lbs with a body-fat percentage of 20%. What will his approximate weight be when he reaches his goal of 15% body fat, assuming that his lean body mass remains constant? A. 144 lbs
B. 149 lbs
C. 169 lbs
D. 175 lbs

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)