Frances Hartman,a 68-Year-Old Retired Art Dealer,has Chronic Joint Pain in Both

Frances Hartman,a 68-year-old retired art dealer,has chronic joint pain in both knees and hips.She does not have osteoarthritis,but is overweight and sedentary.While Frances believes she needs to convince her orthopedic surgeon that she should be considered a candidate for joint replacement surgery,her neighbor Chris,a perioperative orthopedic nurse,is teaching Frances about the role of cartilage in the joints and how to prevent further injury.Chris has convinced Frances to join her in stretching exercises and a daily walk through the neighborhood.Chris has explained to Frances that this program can help prevent degenerative conditions because:

A) exercise makes the cartilage more vascular.
B) exercise restores water to the cartilage intracellular compartment.
C) weight-bearing activities and joint movement prevent cartilage from becoming thin or damaged.
D) exercise and joint movement will increase joint lubrication and pain threshold.