Consider two reactions A and B for which the variation of $$RT \ln K$$ with temperature is given in the plots below. If the enthalpy change for the reactions are $$-25$$ kJ per mol and 20 kJ per mol respectively for A and B, the correct statement is

A

The equilibrium constant for Reaction B decreases as temperature increases.

B

The entropy change for Reaction A is 50 kJ per mol.

C

Reaction A remains spontaneous only at temperatures less than 500 K

D

At 400 K, reaction B changes from exothermic to endothermic reaction.