The first one is the one that English teachers look for. Although a professional research paper is important, it can be accomplished without multiple sources.
Plagiarism is only the case when that one source is the only writing in your paper, or you didn't cite the source.
As for the length, I can make a pretty strong point in one paragraph.
I read this story and so I can say its answer should be 4 (She has gained a deeper understanding of her daughter).
<span>Rev. Hale. He wants to save their lives.</span>
The answer is b to support the authors opinion about oceans