Rheumatoid arthritis is an autoimmune disease which causes the joints in the body to be constantly inflammed. This disease results when body tissues are A. infected by a virus. B. infected by bacteria. C. attacked by one's own immune system. D. attacked by oxygenated red blood cells.

Respuesta :

The answer to your question is A


the answer to your problem is C i just did this question and thought it was D but turned out to be C