已知下列数据：

Fe(s)＋1/2O₂(g) ＝FeO(s) △H＝－272kJ·mol^-1

2Al(s)＋3/2O₂(g) ＝Al₂O₃(s) △H＝－1675kJ·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