A nurse is preparing to administer prednisone to a client for treatment of rheumatoid arthritis. Which of the following findings indicates to the nurse the treatment is effective?

A. Improved mood is not a primary indicator of prednisone effectiveness for rheumatoid arthritis. B. Prednisone can actually increase blood glucose, so a decrease is not expected. C. Improved range of motion indicates reduced inflammation and joint stiffness, demonstrating effective treatment of rheumatoid arthritis. D. Prednisone is an immunosuppressant, so increased immunity is not an expected outcome.