Definition: 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: Fresh Air In My House. Sentence 1: The air ducts needed cleaning. Sentence 2: I called the air duct cleaning service. Sentence 3: They arrived promptly at noon. Sentence 4: The cleaners cleaned all of my air ducts. Choices: a. Bob's success restored Jo's confidence, healing them both. b. The air in my house is now cleaner.
Output:
b