Definition: In this task, you will be given a short story. One sentence from the story is chosen. Consider the events that happen before that sentence, or are likely to have happened before it. Does any of them directly cause it, or simply make it possible? You should write your answer in the form " A >causes/enables> B". Try to use phrases and sentences from the story to compose your answer when possible.
Input: story: Becky loved her mother. But one evening she broke her mother's heart. Her mother called out for her like she always did. But Becky was in a bad mood and snapped at her mother. Becky broke her mother's heart when she told her to get a life.
 selected sentence: But one evening she broke her mother's heart.

Becky snaps at her mother >Causes/Enables> Becky breaks her mother's heart