已知下列热化学方程式：
（1）CH₃COOH (l)+2O₂ (g) == 2CO₂ (g)＋2H₂O (l)  ΔH₁＝－870.3 kJ·mol^-1
（2）C (s)+ O₂ (g) == CO₂ (g) △H₂＝-393.5 kJ•mol^-1
（3）H₂ (g) +O₂ (g) == H₂O (l) △H₃＝-285.8kJ·mol^-1
则反应2C (s)+2H₂ (g) +O₂ (g) == CH₃COOH (l)的△H为

A：-488.3 kJ·mol^-1

B：-244.15 kJ·mol^-1

C：+488.3 kJ·mol^-1

D：+244.15 kJ·mol^-1