It was very hard for me to make a—but J decided to leave my job A suggestion B decision C

问题补充：

It was very hard for me to make a—but J decided to leave my job

A suggestion B decision C plan D speech

答案：

解析：名词辨析。Suggestion建议；decision决定；plan计划；speech演讲，讲话。句意；做这样一个决定对于我来说非常难——但是我决定辞去我的工作。结合语境可知选B。