Q: In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.
Sentence1: Jane used to be a fan of the New York Mets. Sentence2: She was really hoping they would win this year. Sentence3: When they lost the World Series, she was pretty upset. Sentence4: Now she's declared herself a Yankees fan.
A:
She must have felt pretty frustrated.