Definition: In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.
Input: Sentence 1: Nancy saw an infomercial for an electric toothbrush. Sentence 2: And she ordered it right away. Sentence 3: But after months of using it, her gums began to deteriorate. Sentence 4: She went to the dentist. Sentence 5: But there was nothing that could be done. Choices: a. Electric Toothbrush. b. Trip to Australia.

a