The ability to lift a weight 12 times or more is not optimal for growing muscle mass. If you can't lift a weight eight or more times you are also not optimally building muscle mass. Generally speaking, the target goal for lifting weights to build muscle is anywhere between eight and 12 reps.
Number one is D and number two is B
I think one thing you could do in order to measure your cardiovascular strength you can do a full sprint run. In order to help improve your fitness levels you can swim, jog/run, body weight exercises, and a balanced diet.
Answer: it would be good to be a CNA if you can. They have classes many times in 11th grade where you can go to hospitals or nursing homes to help and get paid! Many times nurses will let you shadow them in the hospital.
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