已知：
2Fe(s)＋O₂(g) ＝2FeO(s)    △H＝－544kJ·mol^－1
4Al(s)＋3O₂(g) ＝2Al₂O₃(s)  △H＝－3350kJ·mol^{－1[:学_科_网]}
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