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 Vet. Sentence 1: I made an appointment for my dog to get a check up. Sentence 2: On the day of the appointment, my dog was excited to go for a ride. Sentence 3: The closer we got to the vet, the more nervous he got. Sentence 4: At the vet she started to relax and even got a treat. Choices: a. She had a good day, and doesn't hate the vet. b. She had to buy some more.
A:
a