Given the task definition and input, reply with output. 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.

Title: The Slippers. Sentence 1: Shayna was freezing. Sentence 2: She normally wore lots of layers but she had only packed a few things. Sentence 3: She got back to her hotel room and put on her slippers. Sentence 4: Finally, she was warm! Choices: a. She decided never to take the slippers off again. b. Mary wished she had picked herself.
a