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: Shoe laces. Sentence 1: Trent found it hard to learn how to lace his shoes. Sentence 2: His mother showed him over and over but he didn't grasp it. Sentence 3: He had to practice on his own to eventually understand it. Sentence 4: When he did, he was so happy, he went for a run. Choices: a. But I must admit that the time for conversation was actually nice. b. And when his shoelaces were undone, he did them again.

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
a