Answer:
Rheumatoid arthritis is considered a disease (n) __autoimmune______ because it implies that the body confuses its own healthy cells with invaders and attacks them repeatedly.
Step-by-step explanation:
Rheumatoid arthritis is a chronic and degenerative inflammatory disorder that affects joints and also skin, eyes, lungs, heart and blood vessels. The immune system attacks healthy body cells, which is why it is considered an autoimmune disease.