Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Title: Insulation. Sentence 1: In 2007 our condo had mice. Sentence 2: We used traps and bait. Sentence 3: We killed some mice but more came. Sentence 4: Our property manager sealed every crack with foam. Choices: a. My father opened the door and fixed the flag with the bus running. b. That kept the mice out for four years.
Student:
b