Calculate $\Delta$ S_total for the Isothermal Irreversible Free Expansion of 1

Multiple Choice

Calculate $\Delta$ S_total for the isothermal irreversible free expansion of 1.00 mol of ideal gas from 8.00 L to 20.00 L at 298 K.

A) 0
B) +15.2 J.K^-1.mol^-1
C) +7.6 J.K^-1.mol^-1
D) (-15.2 J.K^-1.mol^-1 )
E) (-7.6 J.K^-1.mol^-1 )