Calculate the Standard Enthalpy of Formation of Bicyco[1

Calculate the standard enthalpy of formation of bicyco[1.1.0]butane (shown below)
given the standard enthalpies of formation of C(g) and H(g) ,717 and 218 kJ.mol^-1,respectively,and the average C-H and C-C bond enthalpies,412 and 348 kJ.mol^-1,respectively.

A) +175 kJ.mol^-1
B) (-472 kJ.mol^-1 )
C) +312 kJ.mol^-1
D) (-36 kJ.mol^-1 )
E) (-124 kJ.mol^-1 )