图中A．B两点均为螺口灯泡的螺旋部分，当两开关都断开后、站在地上的人用手直接接触A点时，他 _________ 触电，用手直接接触B点时，他 _________ 触电（选填“会”或“不会”）．

What a pity! Considering his intelligence and diligence, he ______ a higher grade.[ ]

A. can have achieved                  

B. must have achieved

C. need have achieved              

D. might have achieved