Instructions: 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.
Input: Title: Covered Calls. Sentence 1: Hal owned many stocks. Sentence 2: He wanted to sell some, but was afraid of the tax consequences. Sentence 3: Instead, he wrote call options on these stocks. Sentence 4: Hal was delighted with the income generated by these trades. Choices: a. After the options expired worthless, Hal felt happy. b. Bob caught a big fish.
Output:
b