Rheumatoid arthritis is caused by which of the following?

Rheumatoid arthritis is primarily classified as an autoimmune disorder, which means it occurs when the body's immune system mistakenly attacks its own cells and tissues. In this condition, the immune system targets synovium, the lining of the membranes that surround the joints, leading to inflammation, pain, and eventually joint damage. This fault in immune system functioning is the key factor in the development of rheumatoid arthritis, distinguishing it from other types of arthritis that may be related to joint injuries, wear and tear (as seen in osteoarthritis), or infections caused by viruses. Thus, the correct understanding of rheumatoid arthritis as a product of immune system dysfunction is crucial for acknowledging its underlying pathology and directing appropriate treatment strategies.