i don't know who he is_i let him in a.and b.or c.so

i don't know who he is_i let him in a.and b.or c.so
i don't know who he is_i let him in a.and b.or c.so

i don't know who he is_i let him in a.and b.or c.so
选择B,or表示否则
and表示并列,和的意思
so表示结果,因此所以的意思
翻译：我不知道他是谁,否则的话,我会让他进来

b否则