已知下列数据：
2Fe(s)＋O₂(g) ＝2FeO(s)    △H＝－544kJ·mol^－1
4Al(s)＋3O₂(g) ＝2Al₂O₃(s)  △H＝－3350kJ·mol^－1
则2Al(s) +3FeO(s) ＝Al₂O₃(s) + 3Fe(s)的△H是

A．－ 859 kJ·mol^－^1	B．＋859 kJ·mol^－^1
C．－1403 kJ·mol^－^1	D．－2491 kJ·mol^－^1