Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Title: The Car Wash. Sentence 1: David liked caring for his car. Sentence 2: He took it to the car wash. Sentence 3: He scrubbed it and then vacuumed it out. Sentence 4: David was happy when his car looked great. Choices: a. They felt very fortunate that they'd been able to take this trip. b. It made his day go smoother.
Student:

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