Which word best describes Nadia at the end of the story??

This question is incomplete. Here is the complete question:
Which word best describes Nadia at the end of the story? A) scared B) puzzled C) guarded D) confident
Answer:
The correct answer is option D)Confident.
Explanation:
In this excerpt we can see how Nadia feels panicked about playing the piano in front of the audience. She proves to be insecure before she starts, as if she was afraid.
But then she starts thinking about good things, things that calm her down.
So she starts thinking about her home, and Lucky. Things that make her feel calm and forget that she is about to play in front of a large audience.
At this moment, Nadia acquires confidence in herself. And then she manages to play in a way that at the end everyone ends up cheering.
Given this information, we can say that the correct answer is option D.