Which one of the following statements concerning weight and energy balance is most accurate?
a. people generally need the same amount of physical activity to maintain weight stability.
b. regular physical activity doesn’t impact the percentage of body fat in children and adolescents.
c. it’s possible to achieve weight stability by doing the equivalent of 60–120 minutes a week of moderate-intensity walking.
d. the optimal amount of physical activity needed to maintain weight is unclear.
the answer is not c