When you wake up the next morning smelling of liquor but you don't remember why most likely experienced a

a blackout
b blood alcohol concentration
c hangover
d intoxication

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)

The answer i think would be diet coke