Refer to the Phase Diagram Shown Below

refer to the phase diagram shown below.

-The regions labeled A,B, and C are

A) the gas, liquid and solid phases, respectively.
B) the solid and liquid phases and the triple point, respectively.
C) the gas and liquid phases and the critical point, respectively.
D) the solid, liquid and gas phases, respectively.
E) pressure, temperature and moles, respectively.