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 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.
Title: New best friend. Sentence 1: Andrew was in the middle of a morning run when he heard a noise. Sentence 2: He stopped to look around. Sentence 3: In a tied up bag, he found an injured dog. Sentence 4: He immediately ran it to the vet. Choices: a. Roger had to wear a dirty uniform to work. b. Andrew now has a new friend who will grow up and run with him.
A:
a