From the phase diagram given in the passage, predict the likely phase change ... ...

From the phase diagram given in the passage, predict the likely phase change if the following changes happen. Consider point A as the current phase of substance M. What is the most likely effect on substance M, if the pressure was decreased without changing the temperature of the system?  
(A) Gas to liquid
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 07. Liquids, Solids, and Phase Transitions