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An increase in temperature with an altitude increase

A

is indication of an inversion.✓ Correct Answer

B

denotes the beginning of the stratosphere.

C

means a cold front passage.

Explanation

Temperature normally decreases with height; a layer in which it increases with height is a temperature inversion (PHAK Chapter 12). The stratosphere is marked by roughly constant temperature at the tropopause, and a cold front passage is a horizontal change, not this vertical profile.

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