Which is most likely to cause clouds to form in a previously clear sky? Choose 1 correct answer.

Question

A. An air mass sinks and becomes warmer.

B. An air mass sinks and becomes colder.

C. A warmer air mass moves into the area and rises.

D. A colder air mass moves into the area and rises.

Answer 1

C. A warmer air mass moves into the area and rises.