The best course of action if you are a victim of cyberbullying would be to follow these steps:
II. Keep a record of messages received (print or take screenshots)
III. Reach out to parents, teachers, counselors, and school administrators
IV. Block communication from the bully (if possible)
Responding to the bully (I) is generally not recommended, as it may escalate the situation. Therefore, the most appropriate choice is:
II, III, and IV