Answer choice A is called the Heimlich Maneuver. CPR is intended to artificially breath for someone who has suffered a cardiac event (like a stroke or heart attack) and is only done on someone who is unresponsive, not to reduce swelling of the chest muscles. Although answer D is partially correct, the MAIN goal is to provide oxygen to the lungs and blood.
A beneficial burning sensation in a muscle that you are training. This burn is caused by a rapid buildup of, fatigue toxins in the muscle and is a good indication that you are optimally working a muscle group
