The "Triple Point" of a Substance Is That Point for Which

Multiple Choice

The "triple point" of a substance is that point for which the temperature and pressure are such that:

A) only solid and liquid are in equilibrium
B) only liquid and vapor are in equilibrium
C) only solid and vapor are in equilibrium
D) solid, liquid and vapor are all in equilibrium
E) the temperature, pressure and density are all numerically equal