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People living in high altitudes (like mountains) usually have a _________?

Asmaller number of Red Blood Cells
Blarger number of Red Blood Cells
Csmaller number of White Blood Cells
Dlarger number of White Blood Cells

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Correct Answer: B: larger number of Red Blood Cells

Explanation: The correct answer is B: Larger number of Red Blood Cells. People living at high altitudes have a larger number of Red Blood Cells. Lower oxygen levels at altitude stimulate the production of more RBCs to carry sufficient oxygen to the body's tissues.

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