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: Tim got a new dog. Sentence 2: He didn't realize how dumb it was. Sentence 3: It never learned any new tricks. Sentence 4: It tore up his apartment. Sentence 5: Tim still loved it, though. Choices: a. Dumb Dog. b. Ringing.

a