Calculate the Average H-S Bond Enthalpy in H₂S(g)given the Standard

Calculate the average H-S bond enthalpy in H₂S(g) given the standard enthalpies of formation for H₂S(g) ,H(g) ,and S(g) : -20.1,218,and 223 kJ.mol ^{- 1},respectively.

A) 340 kJ.mol ^{- 1}
B) 231 kJ.mol ^{- 1}
C) 10.1 kJ.mol ^{- 1}
D) 679 kJ.mol ^{- 1}
E) 461 kJ.mol ^{- 1}