A lot of people tried their best, but _______ people won the price.   [ ]

A. a few            

B. few                

C. little          

D. a little

已知下列反应的热化学方程式为

（1）CH₃COOH(l)＋2O₂(g)=2CO₂(g)＋2H₂O(l)  ΔH₁＝－870.3 kJ/mol

（2）C(s)＋O₂(g)=CO₂(g)  ΔH₂＝－393.5 kJ/mol

（3）H₂(g)＋O₂(g)=H₂O(l)  ΔH₃＝－285.8 kJ/mol

则反应2C(s)＋2H₂(g)＋O₂(g)=CH₃COOH(l)的ΔH为（  ）

A．－488.3 kJ/mol

B．－191 kJ/mol

C．－476.8 kJ/mol

D．－1 549.6 kJ/mol