Global positioning satellite
I believe the answer is c. flexibility exercises such as light stretching and bending
Strain
Strain is known to be an injury that affects the muscle or tendon by causing twist or tear of a tendon or muscles. Thus, strain can either be complete or partial tear of the muscles or tendon or simple overstretch of the tendon or muscle. Furthermore, strain can be classified as chronic or acute strain.
You didn't really provide any possible choices for us to choose from in this case did you? However, in general it is true that when someone has arthritis it is very beneficial for that person to take up weight lifting or other resistance training because it will eventually lead to muscle increases and improved bone strength.