Detailed Instructions: 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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.
Q: Title: Justin's Cats. Sentence 1: Justin always wanted to own a black cat. Sentence 2: He didn't want to adopt one until he settled down. Sentence 3: He saw a beautiful black cat in a pet store one day. Sentence 4: After a lot of thought, he decided to buy it. Choices: a. Now he can't imagine what life would be like without him. b. Abby was mad that she would have to replace the roof on her house.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
b