Which is a SMART short-term moderate physical activity goal?

A. Lose 2 pounds each week for 3 weeks.

B. Engage in muscle fitness activities three times per week for 3 weeks.

C. Accumulate 30 minutes of brisk walking every day for 3 weeks.

D. Lose 6 pounds by accumulating 30 minutes of brisk walking every day for 3 weeks.​