Which conditions are necessary for rain to form? A. The temperature of the air below the cloud is above freezing.
B. The temperature of the air below the cloud is below freezing.
C. The sky has no clouds, and the temperature of the air is cold.
D. There is a warm layer of air and a cold layer of air closer to the ground.

I did the test and the correct answer is A. This is to help anyone who is confused.