The track coach notices that his star runner is running quicker than ever before, but quickly gets tired and shows evidence of depression after the race. The coach should suspect that the runner might be taking __________.

Amphetamines can temporarily increase alertness, energy, and speed, which may make a runner perform faster. After their effects wear off, a person can experience a “crash,” including fatigue and depressed mood. The best answer is B, amphetamines.

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