Given CH2(g) + 2O2(g) - CO2(g) + 2H2O(1) AH° = -890.4 kJ, the standard enthalpy of
formation of CO2(g) = -393.5 kJ/mol, and the standard enthalpy of formation of H20(1) =
-285.9 kJ/mol,

calculate the standard enthalpy of formation of CH4(g).

A. +74.9 kJ
B. -74.9 kJ
C. -149.8 kJ
D. +149.8 kJ