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20. Reduction of one's ability to exercise or perform work begins at the high altitude of a. 3, 0 feet above sea level. b. 3,500 feet above sea level. C. 4,000 feet above sea level. d. 5,000 feet above
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20. Reduction of one's ability to exercise or perform work begins at the high altitude of

a. 3, 0 feet above sea level.
b. 3,500 feet above sea level.
C. 4,000 feet above sea level.
d. 5,000 feet above sea level.

User Radarek
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1 Answer

9 votes
The answer is d.5000 because you say high level
User Ivbtar
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