Which sentence correctly explains the process and conditions needed for hail to form? (2 points)  a

The temperature of the air and the temperature of the cloud must be below zero.

 b

Liquid water requires temperatures above 0 °C in order to remain in a liquid state.

 c

A form of precipitation requires melting and refreezing as they fall towards the ground.

 d

Ice chunks move around inside a cloud, bouncing into water droplets and growing as they fall.​