Which one of the following choices best represents a short-term benefit of cardiorespiratory fitness?

a. It decreases the risk of heart disease.

b. It relieves stress and boredom.

c. It increases stamina and reduces fatigue.

d. It decreases the chances of viral illnesses.

C - it increases stamina and reduces fatigue.

While stress and boredom reduction are also true, they are not cardiovascular benefits in this case. For that reason, answer C is the correct one. When one starts being physically active for a certain amount of time, increased stamina and reduced fatigue will follow.