Read the dialogue and answer the question.
Ela: I have a problem with my best friend, Duru.
Can: What happened?
Ela: She told my secret to another friend. I feel betrayed.
Can: That's not good. A true friend should keep secrets.
Ela: I know. I don't know if I can trust her again.
Can: You should talk to her. Maybe she didn't mean to hurt you.
Ela: You're right. I'll talk to her.
What is the main problem in the dialogue?
A)Ela is upset because she has no friends at school.
B)Duru shared Ela's secret without permission.
C)Can is angry because Ela ignored his advice.
D)Ela told a secret about Duru to another friend.