The Wet Adiabatic Lapse Rate Is

The wet adiabatic lapse rate is

A) the average change in temperature of still air with altitude.
B) changes in temperature that occur due to variations in air pressure.
C) the rate at which an unsaturated body of air cools while lifting or warms while descending.
D) the altitude at which water changes from the vapor to the liquid phase.
E) the rate at which a saturated body of air cools as it lifts.