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: Window Nap. Sentence 1: Kate wanted to nap in the car on a road trip. Sentence 2: Ideally she would be able to lay down in the back seat. Sentence 3: But there were too many people in the car for that. Sentence 4: She fell asleep sitting upright with her head back. Choices: a. She woke up with her face on the hot window glass. b. I drove off happily knowing that not all cops are bad.
A:
a