In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.
Q: Title: Sleeping Over. Sentence 1: My friend invited me to sleep over at her house. Sentence 2: She said that I could sleep on her couch. Sentence 3: Her couch was too short, so I didn't fit on it. Sentence 4: I was awake most of the night trying to sleep. Choices: a. When I awoke the next morning, I had overslept. b. Farrah regretted her decision immediately.
A:
a