If, at Constant Pressure, the Absolute Temperature of a Flask

Multiple Choice

If, at constant pressure, the absolute temperature of a flask equipped with a moveable piston is reduced to half its original absolute temperature, what must be the new volume?

A) 1/4 the original volume
B) 1/2 the original volume
C) two times the original volume
D) four times the original volume
E) equal to the original volume