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What is the answer to this question

What is the answer to this question-example-1
User Meridith
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2 Answers

5 votes
A sorry if I’m wrong
User Drusolis
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3 votes

Answer:

(A)

Step-by-step explanation:

It decreases cuz when they start climbing a mountain there air pressure is getting low and so is their blood. The higher they go the more it decreases. Hope this helps:)!

User Noddy
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