His strong sense of humor was ____ make everyone in the room burst out laughing.

选c 因为so as to so that 是表示结果状语的 而这题在be动词后应是表语 such 这里做表语 as to 加上后面的部分是修饰 such的

so as to
为的是,以便

A

c.such做表语,翻译成就是如此.
such..as to动词不定式做目的状语.