A possible paragraph that addresses the question is this:
Students must take American Literature before graduating from high school because it will help them to understand the root of certain societal issues. Tus, they will know how to deal with problems in later years. Taking American Literature will also help them to understand their complex and diverse environment. This knowledge will foster better relations with people from other nations.
<h3>What is American Literature?</h3>
American literature are forms of prose and poetry that explains American root and culture.
Students should be acquainted with these because it will help them to expand their knowledge and understanding of their society.
<em>Percy thinks that his mom is too good for Gabe, who's yelling for some bean dip. Percy is caught between fearing that Grover is onto something and trusting his mom that everything is normal. The fact that Percy feels such a sense of relief around Mom speaks to the strength of their relationship.</em>
"A. You know, of course, that she used to dive for her college swim team." does not have any errors in comma usage. "Of course" is almost always surrounded by commas.
