Which of the Following Relates to the Term "Vapor Pressure

Multiple Choice

Which of the following relates to the term "vapor pressure of a liquid"?

A) the pressure exerted by a liquid on the walls of a container
B) the partial pressure exerted by a gas in equilibrium with its liquid form in a closed system
C) the pressure exerted by a liquid on the walls of a container and the partial pressure exerted by a gas in equilibrium with its liquid in a closed system
D) none of these are true