A．C+H2OCO+H2；△H=+10.94kJ/mol

B．C(s)+H2O(g)CO(g)+H2(g); △H=+10.94kJ/mol

C．C(s)+H2O(g)CO(g)+H2(g); △H=－131.3kJ/mol

D．C(s)+ H2O(g)CO(g)+ H2(g); △H=+65.64kJ/mol