It is worth pointing out that the mishearing or misunderstanding of instructions in English, and the use of another language, in an international conversation, ______ two recent aircraft accidents.

A．leading to

B．to lead to

C．led to

D．have led to

当人处在群体中时，有时会作出平时不会作的破坏性行动，这是( )。

A．从众现象

B．社会干扰现象

C．去个体化现象

D．群体极化现象