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: Beth wanted a dog. She asked her mother. Her mother said yes. Beth was so happy. Beth got a great family dog and was happy.
 selected sentence: Beth was so happy.

Her mother says Beth can have a dog >Causes/Enables> Beth is so happy