Definition: 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.
Input: Title: Small Runner.. Sentence 1: Bobby wanted to try out for the track team. Sentence 2: He did not think he was good enough so he started to practice. Sentence 3: He ran back and forth on his block to improve his speed. Sentence 4: When he finally tried out for the team, he got on it! Choices: a. 5 years later and they just celebrated an anniversary on labor day. b. He realized that his hard work is what made him good at the sport.
Output:
b