Detailed 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.
Problem:Title: No Brushing. Sentence 1: Isla had trouble remembering to brush her teeth. Sentence 2: She thought nothing of it until one day she was in some photos. Sentence 3: She noticed how yellow and ugly her teeth looked in the picture. Sentence 4: From then on she vowed to brush her teeth better. Choices: a. Before they knew it the sun rose and they had talked all night. b. Luckily her teeth began to improve slowly.
Solution:
b