Answer the Question in the Following Paragraph from One of the Perspectives

Answer the question in the following paragraph from one of the perspectives described in the text.
Lisa's algebra class has a quiz every other Friday. This is the third time she's been so worried about other matters that she hasn't done quite as well on the quiz as she might have otherwise. What has her upset is the fact that the instructor leaves the room while the students take the quiz, and over half the class is taking the opportunity to cheat. She knows and likes several of the other students in the class, and some of the ones she likes are among those who are cheating. Lisa knows that (a) a failure to speak to the teacher about the cheating will result in her own grade being lower, since the teacher grades in part on the curve. But (b) she will be doing her friends and the others a great harm, since cheating is taken very seriously at the school. If she doesn't "turn in" her classmates, (c) the only other alternative to getting a worse grade than she deserves is to begin cheating herself, something she's never done. What should she do?