99. Oneof the limiting factors in human physical performance is the amount of oxygenthat is absorbed by the muscles from the bloodstream. Accordingly, entrepreneurs have begun sellingat gymnasiums and health clubs bottles of drinking water, labeled “SuperOXY,”that has extra oxygen dissolved in the water. Such water would be useless inimproving physical performance, however, since the amount of oxygen in the blood of someone who is exercising isalready more than the muscle cells can absorb. Whichof the following, if true, would serve the same function in the argument as thestatement in boldface? A.world-class athletes turn in record performances without such water B.frequent physical exercise increases the body’s ability to take in and useoxygen C.the only way to get oxygen into the bloodstream so that it can be absorbed bythe muscles is through the lungs D.lack of oxygen is not the only factor limiting human physical performance E.the water lost in exercising can be replaced with ordinary tap water
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