Based on the U.S. Surgeon's Report of 1996, which of the following is TRUE?
a. Americans are becoming more obese because they lack enough sleep, carbohydrates, and protein in the meals they eat.
b. An exercise program must consist of aerobic activities of 30 min or more twice a week to be effective.
c. Important health benefits can be obtained by including a moderate amount of physical activity on most, if not all, days of the week.
d. Exercise programs can only be effective if they involve both small and large muscle groups and are done every day.
Answer: C