An Ideal Gas Is Allowed to Expand Adiabatically Until Its $\gamma$

Multiple Choice

An ideal gas is allowed to expand adiabatically until its volume increases by 50%.By approximately what factor is the pressure reduced? ( $\gamma$ = 5/3. )

A) 1.5
B) 2.0
C) 2.5
D) 3.0
E) 3.5