You gain health benefits from exercising for a minimum of
a. 10 minutes three times a week
b. 10 minutes two times a week
c. 20 minutes three times a week
d. 20 minutes two times a week

You gain health benefits from exercising for a minimum of twenty minutes three times a week. The American Centre for Disease Control and prevention recommeds that people [adults] should engage in physical activities for at least thirty minutes on five of the days of the week.