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: Lou had a coupon to a sandwich place. He liked it but didn't go often because it was a bit expensive. He ordered his favorite sandwich. When he handed the coupon to the clerk she said it was expired. He was too embarrassed not to go ahead and pay full price.
 selected sentence: He was too embarrassed not to go ahead and pay full price.

The clerk says Lou's coupon is expired >Causes/Enables> Lou is too embarassed not to pay full price