During the evening, cold air from mountaintops rushes into the valleys below. Why does this occur? O A. Cold air is less dense than warm air, causing the cold air to sink. B. Global wind patterns cause this wind movement at night. O C. Cold air is denser than warm air, causing the cold air to sink. D. As clouds develop on the mountaintops, precipitation causes wind movement.​
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During the evening, cold air from mountaintops rushes into the valleys below. Why does this occur? O...
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