A. Choose A, B, C, D, or E for the correct answer.

This dialog is for questions 3 to 5.

Nana: Congratulations! You've got the black belt in Karate. I'm so proud ofyou!

Rio: Thanks. I also have a bigger responsibility at this level.

Nana: What is that?

Rio: As a black belt Karate athlete, I must be able to control my emotion and be disciplined in all aspects of my life.

Nana: Wow! I believe you can do that.

Rio: Thank you.

What is Nana feeling in the dialog?