JEE Main 2020 Chemistry question

For a reaction, , the free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which :

• (A)the slope changes from positive to zero
• (B)the free energy change shows a change from negative to positive valueCorrect
• (C)the slope changes from negative to positive
• (D)the slope changes from positive to negative