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An atmosphere with an oxygen level of 17.5% A. Has the optimum oxygen level B. Is oxygen deficient C. Is oxygen enriched D. Has the minimum safe level of oxygen

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James

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Answer

B. Is oxygen deficient

Explanation

The normal level of oxygen in the atmosphere is approximately 20.9%. An atmosphere with an oxygen level below 19.5% is generally considered to be oxygen deficient. Therefore, an atmosphere with an oxygen level of 17.5% is oxygen deficient.

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