7. For the combustion of ethyl alcohol as described in the above equation, which of the following statements is(are) true? C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(Λ), ΔΗ = −1.37 x 103 kJ I: The reaction is exothermic； II: The enthalpy change would be different if gaseous water were produced； III: The reaction is not an oxidation-reduction one； IV: The products of the reaction occupy a larger volume than the reactants. (A) I, II (B) I, II, III (C) I, III, IV (D) III, IV (E) I only