Use the Following Thermodynamic Values to Calculate ?_r $G ^ { 0 }$

Use the following thermodynamic values to calculate ?_r $G ^ { 0 }$ .
$\Delta_{r}$$H^{\circ}$ = -95 kJ $\mathrm { mol } ^ { - 1 }$ , $\Delta_{r}$$S ^ { 0 }$ = -157 J $\mathrm { mol } ^ { - 1 }$ ,T = 855 K

A) -48 kJ $\mathrm { mol } ^ { - 1 }$
B) -68 kJ $\mathrm { mol } ^ { - 1 }$
C) +39 kJ $\mathrm { mol } ^ { - 1 }$
D) -157 kJ $\mathrm { mol } ^ { - 1 }$
E) +142 kJ $\mathrm { mol } ^ { - 1 }$