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 used to smoke a pack of cigarettes a day. Sentence 2: I had tried many times to quit smoking. Sentence 3: Finally, I was able to quit smoking by switching to e-cigarettes. Sentence 4: Then I read that e-cigarettes are harmful to my health, too. Sentence 5: Now I am trying to quit using e-cigarettes. Choices: a. Smoker. b. Skittles.

a