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: Pond. Sentence 1: Nia wanted a koi pond. Sentence 2: But when she shopped around, she was aghast. Sentence 3: Prices were very high! Sentence 4: Nia filled her pond with goldfish instead. Choices: a. They were much cheaper, and no one knew the difference! b. Ron never smoked again.
A:
b