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: Erica had to decide whether to take her final or go help friends. Sentence2: School was important to her, but her friend was in an emergency. Sentence3: Erica told her professor her situation. Sentence4: The professor said she could make up the final at a later date.
Erica was so grateful that her professor was understanding.