The Incidence of Rheumatoid Arthritis Increases as People Age Because

The incidence of rheumatoid arthritis increases as people age because

A) the body might generate autoimmune-altered molecules with advanced age.
B) aging often brings about muscle atrophy with associated weakness.
C) the cartilage of joints normally wears down with age.
D) the body decreases the production of collagen, starting at age 30.
E) diseases such as rheumatoid arthritis can take a long time before signs and symptoms become apparent.