Which sentence contains an opinion of the author and is too informal for the tone of this passage?

According to the study, a is when you string one quote after another in an essay without connecting them

Emily is reading her friend's story. it uses transition words like and emily can tell that this story's organization is a) sequence of events b) cause and effect c) compare and contrast d) question and answer

In at least 150 words, discuss the symbolic significance of janie’s hair in their eyes were watching god