A Galvanic Cell Is Composed of These Two Half-Cells, with the Standard

A galvanic cell is composed of these two half-cells, with the standard reduction potentials shown: What is the standard free energy change for the cell reaction of this galvanic cell?

A) -12 kJ
B) +12 kJ
C) -23 kJ
D) +23 kJ
E) -46 kJ