Below Is a Phase Diagram for Compound X

Multiple Choice

Below is a phase diagram for compound X. You wish to purify a sample of X that was collected at P = 1.0 atm and T = 100 by subliming it. In order to sublime the sample, you should

A) increase T to 300 K, keeping P = 1.0 atm.
B) abandon the attempt to sublime X.
C) lower P to 0.5 atm and then increase T to 200 K.
D) increase P to 1.5 atm and then increase T to 300 K.
E) increase T to 300 K and then lower P to 0.5 atm.