I'd personally say B because a warmup will reduce injury, soreness, and get you ready. Then you have your exercise. Then the cooldown helps <span>bring the heartrate down to near-normal and to get the blood circulating freely back to the heart. Stopping abruptly could result in fainting or place undue stress on the heart.</span>
FOR EXAMPLE:
Let's say you've been taking melatonin every single night to help you sleep. After a while, you may notice that it begins to take more and more melatonin for it to work like it did the first night you took it. You were taking one per night, but you end up taking 3 per night to get the same effect because your body has resistant to the drug.
ANSWER:
After a while of taking antibiotics, microorganisms in your body may become resistant to the antibiotics (which is potentially dangerous). This occurs when bacteria change to reduce the effects of a drug.
Not 100% sure but I'd go with A(:
