The Standard Free Energy of Formation of KBr(s)is -380 $\Delta$ _rG° for the Reaction 2KBr(s)

The standard free energy of formation of KBr(s) is -380.4 kJ/mol. $\Delta$ _rG° for the reaction 2KBr(s) $\to$ 2K(s) + Br₂(l) is:

A) 760.8 kJ
B) 380.4 kJ
C) -760.8 kJ
D) -380.4 kJ
E) none of these