The answer is C. Time of the Activity
To put it simply, it's how much time you're willing to put into your workout.
For Muscle Building, it also can be defined as how many or times a person can do a specific musce building exercise
Explanation:
racecar backwards is racecar. but racecar sideways is how paul Walker died
All sports value fast reaction time.
Tennis, basketball, track, and soccer are examples of those sports.
Antigens are any molecules that elicit adaptive immune response. Antigens protrude from pathogens or other intruding substances. Antibodies are proteins found in blood plasma that attach to one particular kind of antigen and help to counter its effects.