The Heat of Combustion, ΔHcomb, of 1-Butene(l), C₄H₈(l), Is -2696

The heat of combustion, ΔHcomb, of 1-butene(l) , C₄H₈(l) , is -2696.9 kJ/mole. From the following values of ΔH°f CO₂(g) = -393.5 kJ/mol and ΔH°f H₂O(l) = -285.8 kJ/mol, calculate the standard enthalpy of formation of butene(l) .

A) +2017 kJ
B) -2017 kJ
C) -3376 kJ
D) -107.7 kJ
E) -20.30 kJ