What Is the Change in Free Energy $\Delta$ G) for the Hydrolysis of ATP to ADP and P_i

Multiple Choice

What is the change in free energy ( $\Delta$ G) for the hydrolysis of ATP to ADP and P_i in the cell?

A) +12 kcal/mol
B) -1.2 kcal/mol
C) -7.3 kcal/mol
D) -12 kcal/mol