She plagiarized the short history because she wants to get a good score on the test, because she feels compelled to be a student with good results.
Although you have not shown the text this question refers to, we can tell from the context of the question that you are referring to the article "Why I lied to everyone in high school about knowing karate?"
When reading this text, we can see that:
This pressure that the author felt and the fear of failing in some activity, made her plagiarize an entire short story, during an activity in English classes.
This plagiarism generated more concerns for the author's life because she knew she would be discovered, as her school decided to reward her for the short written story, which would cause a lot of shame for her and her parents.
You can find more information at the link below:
https://brainly.com/question/24626417?referrer=searchResults
https://brainly.com/question/17415254?referrer=searchResults