Final answer:
Option (C), Arthritis is defined as joint pain and inflammation, with osteoarthritis being the most common type caused by 'wear and tear' on the articular cartilage, often associated with aging.
Step-by-step explanation:
Arthritis defines joint pain and inflammation. It is a common disorder of the synovial joints characterized by inflammation which leads to significant joint pain, swelling, stiffness, and reduced joint mobility. The most common type of arthritis is osteoarthritis, often associated with aging and 'wear and tear' of the articular cartilage. Risk factors include injury, physical labor, certain sports, and being overweight. Mechanical stress on joints with insufficient self-repair of cartilage and low-grade inflammation contribute to the development of osteoarthritis. Treatments may involve lifestyle changes, medications, and in severe cases, joint replacement surgery.