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I believe its B. But they are also ancient land structures.

Explanation: I don't have one. I just know.

answer; i believe the answer is (false); ///good luck

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.