Phase Equilibrium Between the Gaseous and Liquid States Describes the Situation

Multiple Choice

Phase equilibrium between the gaseous and liquid states describes the situation when

A) no more molecules leave the liquid and enter the gas.
B) no more molecules leave the gas and enter the liquid.
C) as many molecules go from liquid to gas as from gas to liquid.
D) the liquid is boiling.
E) None of the other choices is correct.