What effect does raising the temperature of the reaction chamber at a constant pressure have on the following reaction at equilibrium?

Question

2NO2(g) N2O4(g) + heat

A. The equilibrium shifts toward the reactants because the reverse reaction is endothermic.
B. The concentration of NO2 increases because there are more moles of reactants.
C. The products are favored because more heat is produced.
D. There is no change to the system because the pressure is constant.

Answer 1

the reaction will try to undo the increase in heat, and favor the endothermic direction: A)

Answer 2

A. The equilibrium shifts toward the reactants because the reverse reaction is endothermic.