Estimate Δ_rG° for the Following Reaction at 775 K

Estimate Δ_rG° for the following reaction at 775 K. 2Hg(g) + O₂(g) → 2HgO(s) Δ_rH°= -304.2 kJ mol^-1; Δ_rS°= -414.2 J K^-1 mol^-1

A) -625 kJ mol^-1
B) -181 kJ mol^-1
C) +17 kJ mol^-1
D) +321 kJ mol^-1
E) -110 kJ mol^-1