Answer:
B. Students should protest against the principal’s policy on prom parties because he's too old to understand what teenagers want.
Step-by-step explanation:
Ad hominem logical fallacy is the type of argument that hurls an attack at the person making the argument on a personal level. Simply put, in this type of logical fallacy, the person making the argument is personally attacked along with the same argument he makes.
On that note, option B is the correct example of such a fallacy. Here, the students' personal attack on the principal for his policy about prom parties is a direct attack on his individuality. And by attacking the principal on a personal level, the students are making their argument on the logical fallacy of ad hominem.
Thus, the correct answer is option B.