设N_A表示阿伏加德罗常数的值，下列说法中正确的是   [ ]

A．1mol金刚石中含有C-C键数目为4N_A

B．56g铁粉在1mol Cl₂中充分反应失去电子数为2N_A 

C．标准状况下，2.24LH₂O含有的分子数等于0.1N_A 

D．标准状况下，44.8L NO₂与N₂O₄混合气体中分子总数小于2N_A

The driver ____ have drunk a lot before the accident, but I'm not quite sure of that．

A．might

B．must

C．should

D．would