They are unfamiliar to the reader.
Answer:
Online bullying
Explanation:
Bullying—including cyberbullying—causes significant emotional and psychological distress. Just like any other victim of bullying, cyberbullied kids experience anxiety, fear, depression, and low self-esteem. They also may experience physical symptoms, and struggle academically. But targets of cyberbullying also experience some unique consequences and negative feelings.
When people lie, it causes a mistrust between friends.
The answer to your question is D
