Given the Following Two Measurements of the Equilibrium Constant for a Reaction

Given the following two measurements of the equilibrium constant for a reaction, calculate $\Delta$ H ^$\circ$ for the reaction.

A) 255 kJ/mol
B) (-271 kJ/mol)
C) 3,250 kJ/mol
D) (-3,250 kJ/mol)
E) (+271 kJ/mol)