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: Cracked tooth. Sentence 1: Glenda was eating a piece of steak. Sentence 2: She accidentally bit into a piece of bone. Sentence 3: All of a sudden she heard a crack. Sentence 4: Soon followed an intense pain. Choices: a. They drove to the pet store and bought her a fish as promised. b. She reached into her mouth and pulled out a cracked tooth.
b