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Together, oxygen and nitrogen comprise what percentage of the atmosphere? A) less than 1% B) less than 10% C) about 25% D) about 75% E) more than 95%

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Together, oxygen and nitrogen comprise what percentage of the atmosphere?
A) less than 1%
B) less than 10%
C) about 25%
D) about 75%
E) more than 95%

 
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