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: Olivia was excited for her first day of school. She hopped on the school bus and took a seat. When the bus got to the school she walked into the classroom. Her teacher greeted her with a nice smile. Olivia felt very welcomed and happy at this point.
 selected sentence: Olivia felt very welcomed and happy at this point.

Olivia's teacher greets her >Causes/Enables> Olivia feels welcomed