How can an individual benefit from participating in the recommended amount of physical activity?
a. decreased risk of developing certain diseases
b. decreased ability to manage stress
c. increased ability to go without sleep
d. increased chances of developing hypertension

Its A because you don't want your ability to manage stress to decrease, exercise is mist likely going to help you sleep better and hypertension is high blood pressure. Physical activity decreases the chance of developing it. Exercise is known to decrease the risk of getting a disease.