Voice volume is the right answer i think
Someone with Emphysema will usually be diagnosed with COPD ( Chronic obstructive pulmonary disease) This means their air sacs in there lungs are damaged and the inner walls of the the lungs are weakened and cause larger air spaces. This disease commonly causes bronchitis frequently, hard time breathing , lower immune system.
The answer would be D. Frequent infections.
All of these do seem like possible injuries that could happen in sports the answer that makes the most sense to me is B since it seems like getting arthritis from sports injuries does not seem that common,
