The Triple Point of a Substance Is the Temperature and Pressure

Multiple Choice

The triple point of a substance is the temperature and pressure at which

A) all three physical states cease to exist.
B) sublimation, fusion, and condensation are taking place simultaneously.
C) the solid will always float on the liquid for all substances.
D) the vapor pressure of the liquid is higher than the vapor pressure of the solid.
E) the vapor pressure of the solid is higher than the vapor pressure of the liquid.