Which of the following would be MOST helpful in maintaining healthy bone mass?
Select one:
a. Jogging, jumping rope, or playing tennis 30 minutes a day, 4 days a week.
b. Swimming 30 minutes a day, 4 days a week.
c. Consuming a minimum of 4,000 IU of vitamin D daily.
d. Maintaining a BMI between 18.5 and 21.0.A