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 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: Building a Boat. Sentence 1: Freddy and his dad were almost done. Sentence 2: They had been working on building their own boat. Sentence 3: The boat was a constant work in progress, but was almost finished. Sentence 4: The day finally came. Choices: a. They took the boat out on the water and had a blast. b. He then packed up his guitar for good.
A:
a