The reason for behavior that he don't selected in dance program .
Firstly I said you are not fully able to dance program so can't selected ,you also should more practice to select in next times
She is very angry because she wasn't able to participate in the competition. She is very sad as she alone is not able to represent the school at the group annual dance competition.She is feeling inferior to her fellow participants and she is angry with the dance teachers as they have not given chance to her.
I would advise her not to feel sad. I would advise her to practice more dance steps so that she could get a chance next time.