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: Joshua was nervous to go to preschool today. He was used to staying at home with his grandma. When mom dropped him off she told him to have a good day. Joshua looked around and saw many other boys and girls. He made new friends as was excited to come back again.
 selected sentence: When mom dropped him off she told him to have a good day.

Joshua has preschool today >Causes/Enables> Joshua's mom drops him off