Which one of the following statements regarding physical activity and arthritis is most accurate?

Aintense physical activity has been shown to increase the risk of arthritis in individuals over age 50.

Bpost-menopausal women should not engage in physical activity due to the increased risk it places on them to develop arthritis.

Cmoderate exercise reduces swelling in joints and relieves pain associated with arthritis.

Dindividuals who begin to exercise at a younger age are more ...