The system at equilibrium below is heated. How does the system adjust to reestablish equilibrium?

51.8 kJ + H2(g) + I2(g) <=> 2HI(g)

A. The reaction shifts to the right (products) and the concentrations of H2 and I2 increase.

B. The reaction shifts to the left (reactants) and the concentrations of H2 and I2 increase.

C. The reaction shifts to the right (products) and the concentration of HI increases.

D. The reaction shifts to the left (reactants) and the concentration of HI increases.​