As was expected, only five people turned up at the party, __________ disappointed the hostess very much.

A．which

B．that

C．who

D．where

N_A代表阿伏伽德罗常数，下列叙述正确的是（　　）

A．H₂O₂中加入MnO₂，当产生0.1molO₂时转移电子数为0.4N_A

B．常温常压下，0.1mol氖气分子含有的电子数为N_A

C．标准状况下，11.2L氯仿中含有C-Cl键的数目为1.5N_A

D．lL1mol/L葡萄糖的水溶液含有的分子数目为1N_A