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: Home Alone. Sentence 1: Kim's parents were out of town. Sentence 2: They had left Kim three hundred dollars in case of an emergency. Sentence 3: Kim called her friends over and had a party. Sentence 4: She ordered pizzas and bought snacks. Choices: a. Now I don't have anything to do during the days. b. Kim was grounded when her parents returned.
b