已知:①:2C(s)+O2(g)═2CO(q)△H=-221.0kJ/mol②2H2(q)+O2(q)═2H2O(g)△H=-483.6kJ/mol,则制备水煤气的反应C(s)+H2O(g)═CO(g)+H2(g)的△H为()
A.262.6kJ/mol
B.-131.3kJ/mol
C.-352.3kJ/mol
D.+131.3kJ/mol