For Sulfur Hexafluoride, SF₆, the Standard Gibbs Energy of Formation

For sulfur hexafluoride, SF₆, the standard Gibbs energy of formation of is -992 kJ mol^-1 and the standard entropy of formation is -350 J K^-1 mol^-1 at 298 K. Assuming that the values of the enthalpy and entropy of formation vary little with temperature, estimate the standard Gibbs energy of formation of sulfur hexafluoride at 348 K.

A) -992 kJ mol^-1
B) -18 kJ mol^-1
C) -975 kJ mol^-1
D) -1010 kJ mol^-1