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.

Example Input: Title: Spider. Sentence 1: Jessica and Tom were happily married. Sentence 2: One day Jessica saw a spider in their home. Sentence 3: She became very upset. Sentence 4: Tom killed the spider. Choices: a. Jessica became very happy that Tom killed the spider. b. But he managed to ace the exam!
Example Output: a

Example Input: Title: Late For Work. Sentence 1: On the way to work this morning, I got a flat tire. Sentence 2: I had to pull over on the shoulder of the expressway. Sentence 3: After using the jack to lift the car, I successfully changed the tire. Sentence 4: With the spare tire in place, I sped off towards my office. Choices: a. I will never forget the look of surprise on his face! b. I was twenty minutes late, but my boss didn't mind.
Example Output: b

Example Input: Title: Change. Sentence 1: Todd realized he needed a change in his physical health. Sentence 2: He knew exactly where to start. Sentence 3: He went to a farmer's market in search of fresher foods. Sentence 4: He threw out junk food that was in plain sight in his house. Choices: a. Nathan thought for a moment, and said his answer still stands. b. After just a few weeks, he was already starting to see results.
Example Output:
b