<span>I think it would be an example of : B. Specificity
Specifity refer to a principal that stated that What you don in your workout should be relevan;t to what you wanted to achive.
In this case, Jimmy want to improve muscular strength in his arms. Therefore he specified on training the muscles in his biceps.Hope this helps. Let me know if you need additional help!</span>
D. Sleeping habits Because you can’t control what age you are. You can’t control the climate. You can’t control poverty. But u can control your sleeping habits