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: I had a dental appointment I had to go to today. Sentence 2: While getting my teeth checked, my dentist told I had a cavity. Sentence 3: He said it's probably because I've been using subpar toothpaste. Sentence 4: I've been using the same toothpaste he recommended six months ago. Sentence 5: Thanks a lot for the recommendation, doc. Choices: a. Thanks, Dentist. b. The Jacket.

a