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What percentage of North American adults may be functioning below their potential due to prolonged exposure to stress? 

A. 35–40 percent   B. 50–60 percent   C. 45–50 percent   D. 15–20 percent

2 Answers

4 votes
15-20 percent (%)....
User Nafg
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2 votes
it is 15 to 20 percent
User Jjchiw
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