Insufficient data to verify statement A Steps:

• Identify the reaction implied in A: oxidation of NO₂ by O₂ likely forms a higher oxide like N₂O₅, but no ΔH_f for product given.
• Note that ΔH_rxn requires ΔH_f for all species; only NO and NO₂ provided.
• For B: 2NO₂(g) → N₂(g) + 2O₂(g), ΔH = 0 - 2(+33) = -66 kJ (exothermic).
• For C: 2NO(g) + O₂(g) → 2NO₂(g), ΔH = 2(+33) - 2(+90) = -114 kJ (exothermic).

Why A is correct:

• Not enough information.

Why the others are wrong:

• B is actually correct; decomposition releases 66 kJ for 2 mol NO₂.
• C is actually correct; oxidation releases 114 kJ for 2 mol NO.

Final answer: Not enough information.