All of the Following Are Recommendations for Children from the Physical

All of the following are recommendations for children from the Physical Activity Guidelines for Americans except:

A) children and adolescents should do 60 minutes of physical activity 3 days a week.
B) most regular physical activity should be moderate to vigorous aerobic activity.
C) muscle-strengthening physical activity should be included at least 3 days a week.
D) bone-strengthening physical activity should be included at least 3 days a week.