Given the task definition and input, reply with output. 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: The Punctual Friend. Sentence 1: Every time Jan and Susan went out to lunch, Susan showed up late. Sentence 2: Jan was tired of waiting, and cross that her friend was disrespectful. Sentence 3: The next time, she told Susan to meet her at noon at the restaurant. Sentence 4: Jan wrote 12:30 pm in her own calendar, so she didn't have to wait. Choices: a. His boss fired him for the things he said on Twitter. b. It was a smart solution, and they were able to remain friends!
a