Warming up before exercising prevents the cause of injuries, reducing muscle strain and improve muscle performance. The answer is letter D. The goal of warming up is to increase body temperature, increase neural activation, warm up the joints for our body to not be shocked during exercising. It will get your blood flowing, clears waste from your muscles, and brings fluids to your joints. It will improve the performance in exercising by actively moving the joints and increase in muscular performance at the same time eliminating injuries along the way.