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 seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.
Input: Title: Cold Night. Sentence 1: Tom was out hiking at night. Sentence 2: It was summer but the night got cold. Sentence 3: Tom didn't realize how cold it got. Sentence 4: His sweat started cooling him down too much. Choices: a. Tom got pneumonia because of it. b. Now Smelly owns a company.
Output:
a