Riley has been having trouble with her knee. She is puzzled because she has not done anything that she can think of that would stress or strain it. She talks to her trainer about it, and the trainer suggests that she work on her core. Riley is a bit confused about why this is a good idea. How could you BEST explain it to Riley?

A.
Core work is the most skilled kind of training.

B.
Core work is the best way to address any kind of injury.

C.
Core work helps with the alignment of the entire body.

D.
Core work is good when you do not know what else to do.