Determine the Standard Gibbs Energy Change at 298 K for the Reaction

Determine the standard Gibbs energy change at 298 K for the reaction
Hg₂²⁺ (aq) + 2 Cl^- (aq) → Hg₂Cl₂ (s)
Using the data for the standard reduction potentials in Table 17.2.

A) -205 kJ mol^-1
B) -50 kJ mol^-1
C) +205 kJ mol^-1
D) -100 kJ mol^-1