Q: 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 Missing Cat. Sentence 1: On Christmas Eve Lilly could not find the family cat. Sentence 2: She looked everywhere. Sentence 3: She was afraid the cat might have run out the door earlier that day. Sentence 4: In tears she cat down in front of the Christmas tree. Choices: a. She smiled when she saw two cat eyes peering at her from the branches! b. Cathy was so upset, she vowed to never use that business again.
A:
a