题目内容：
Which of the following statements is true about Quiz 2?
A．You use more energy if you walk rather than jog for the same amount of time. B．You use more energy if you jog rather than walk the same distance.
C．You use the same amount of energy whether you jog or walk the same distance.
D．You use the same amount of energy whether you jog or walk for the same amount of time.
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