10 Mole of an Ideal Gas Is in a Container

1.0 mole of an ideal gas is in a container with a volume V1 at a pressure p1 and temperature T1. The gas is slowly compressed isothermally until the final volume is (1/4) V1. The change in entropy is

A) 0 J\K
B) -11 J\K
C) -47 J\K
D) 47 J\K