Mark Suffers from a Severe Pain in His Knees Due

Multiple Choice

Mark suffers from a severe pain in his knees due to an inflammation of the membranes surrounding his knee joints. He finds it extremely painful to walk. If Mark's condition is due to his tissues being attacked by his body's immune system, he is suffering from:​

A) rheumatoid arthritis.
B) osteoarthritis.
C) septic arthritis.
D) psoriatic arthritis.