ΔG° Indicates the Change in the Standard Free Energy as a Reactant

ΔG° indicates the change in the standard free energy as a reactant is converted to product.Given what you know about these values, which reaction below is the most favorable?

A) ADP + P_i → ATP                                                     ΔG° = +7.3 kcal/mole
B) glucose 1-phosphate → glucose 6-phosphate           ΔG° = −1.7 kcal/mole
C) glucose + fructose → sucrose                                   ΔG° = +5.5 kcal/mole
D) glucose → CO₂ + H₂O                                             ΔG° = −686 kcal/mole