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: First Aid. Sentence 1: The man took a class. Sentence 2: He passed the class. Sentence 3: He was certified in first aid. Sentence 4: He was the first one at an accident. Choices: a. They arranged for a neighbor to hold the key instead! b. He used his first aid training to help.
Output:
b