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Stress often causes muscles to A. contract and tighten. B. bruise more easily. C. resist exercise. D. increase in pain.
Stress often causes muscles to D. increase in pain.
Expert answered|andrewpallarca|Points 24372|
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Asked 8/7/2013 4:55:45 PM
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brittany1985, you have been reminded already to answer in a complete sentence by restating the question and provide a source that verify its accuracy.

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Added 8/7/2013 7:13:59 PM
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A. Erythropoietin is a performance-enhancing drug which has the side effect of thickening of the blood.
Added 8/7/2013 5:32:27 PM
brittany1985, your answer does not relate to the question.
Added 8/7/2013 5:34:25 PM
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