题目内容：

已知：Fe₂O₃ (s)＋C(s)= CO₂(g)＋2Fe(s)       △H=234.1kJ·mol^－1

C(s)＋O₂(g)=CO₂(g)  △H=－393.5kJ·mol^－1   则2Fe(s)＋O₂(g ) = Fe₂O₃(s) 的△H是

A．－824.4kJ·mol^－1                                                             B．－627.6kJ·mol^－1

C．－744.7kJ·mol^－1                                                             D．－169.4kJ·mol^－1