Select the correct answer. During a visit to the local clinic, Megan was informed that her body mass index is in the obese range. Currently, Megan is active for only about 10 minutes a day and mostly eats foods high in saturated fats. Which lifestyle plan was most likely recommended for Megan to improve her health?

A. one meal a day and playing sports three times a week
B. a low-fat diet and a 30-minute brisk walk every day
C. a low-fat diet and no change in her activity levels
D. rigorous daily exercise with no change in her diet