已知：①H₂(g)+O₂(g)=H₂O(g) kJ·mol^-1，② C(s)+O₂(g)="CO(g)"  kJ·mol^-1。由此可知焦炭与水蒸气反应的热化学方程式为：C(s)+H₂O(g)=CO(g)+H₂(g) ,则为

A．+131.3 kJ·mol^-1	B．-131.3 kJ·mol^-1
C．+352.3 kJ·mol^-1	D．-352.3 kJ·mol^-1