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: A fun time. Sentence 1: Mark had waited weeks to play golf. Sentence 2: He got an afternoon free from work. Sentence 3: He quickly headed to the golf course. Sentence 4: The golf course was not busy and he got a tee time with no problem. Choices: a. Mark played 18 holes on uninterrupted golf. b. They joked that you had to pay another three dollars.
b