The correct answer is:
Falling action.
The falling action is the section of a literary plot that happens after the climax has been reached and the conflict has been resolved. It´s the event that finishes the story, bringing a resolution or possibly a cliffhanger. In "Bernice Bobs Her Hair" by F. Scott Fitzgerald, the climax is when Bernice decides to be different, act popular and bob her hair. And in this case we have a cliffhanger: when Bernice realizes Marjorie tricked her into bobbing her hair, she cuts Marjorie's braids and leaves town.
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I am not positive of your question but if you are asking what is the way to make your sentences differ from one another. Transitional verbs such as then, therefore, another argument, etc.
Answer:
I am not sure there is a question here, but after reading the info it looks like C would be the best answer.
Explanation:
The paragraph seems to urge you to continue to research why you personally cannot sleep. (the reader)