You will be given a definition of a task first, then some input of the task.
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.

Title: The Fire. Sentence 1: On our long road trip, we were passing through California. Sentence 2: When out of nowhere, we saw a lot of smoke. Sentence 3: As we got closer, we noticed it was a huge forest fire. Sentence 4: We immediately called 9-1-1, and attempted to pass it. Choices: a. Knowing we couldn't risk it, we turned around and found a new path. b. With no oxygen to his brain, the prison did not offer life support.
Output:
a