I believe it C- the activity and your fitness level
Swimming, any type of cardio that requires a lot of breathing
People use the words “sprain” and “strain” almost interchangeably, to describe everything from a twisted ankle to a pulled hamstring. But they're not the same. A sprain is a stretch or tear in a ligament. Ligaments are bands of fibrous tissue that connect bones to bones at joints.
B: enzyme because a substance produced by a living organism that acts as a catalyst to bring about specific biochemical reaction
Well listening helps me from my pain.