The standard enthalpies of formation of CO_2(g), H₂O(g) and CO_(g) in kJ mol^- are -394, -242 and -110 respectively. What is the standard enthalpy change for the reaction CO_(g) + H_2(g)O → CO_2(g) + H_2(g)?

• A.-42 KJ mol^-
• B.+42 KJ mol^-
• C.-262 KJ mol^-
• D.+262 KJ mol^-
• E.