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.

[Q]: Title: Frostbite. Sentence 1: Tim was working outside. Sentence 2: It was very cold as it was winter. Sentence 3: Tim desperately needed the money from this job. Sentence 4: Tim felt numbness in his toes but continued to work. Choices: a. He said this is where he met his deceased wife, and the boy cried. b. Tim suffered a case of frostbite in his toes.
[A]: b

[Q]: Title: Dance. Sentence 1: Aaron was practicing new trendy dance moves. Sentence 2: He stood in front of his mirror to dance. Sentence 3: He was getting really into it. Sentence 4: All of a sudden, his older sister walked in. Choices: a. She laughed at Aaron for five minutes. b. It was basically empty by March.
[A]: a

[Q]: Title: Substitute Teacher. Sentence 1: Josh knew he had a math test coming up for two weeks. Sentence 2: Instead of studying, he put it off and played video games. Sentence 3: The day of the test arrived and he was nervous. Sentence 4: A big smile came over his face when he saw the substitute teacher. Choices: a. However, the smile was gone when she pulled out the math tests. b. I only move in with people I know and trust now.
[A]:
a