Answer:
B. Pathos
Step-by-step explanation:
In persuasion, pathos is an importan tool, it refers to an argument or using arguments that make the audience have an emotional response. It belongs, with ethos and logos, to the "modes of persuasion" in rhetoric. When using pathos, the author usually refers to a personal experience, presents a powerful visual image, or appeals to an audience's sense of duty.
In this case, Ms. Dundum tells a personal experience in which a student in a similar situation than her students, overcomed nervousness and succeded. She is trying to inspire them, showing that they are capable of giving a speech. It is like in the movies where, before a battle, the leader motivates the warriors to never surrender.