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'.

Sentence 1: Hailey loves her dog very much. Sentence 2: Today she brought her dog to the park. Sentence 3: Her dog loved the park and played fetch with a stick. Sentence 4: Her dog ran around in circles with joy. Sentence 5: Hailey decided that from then on she would take her dog more often. Choices: a. OCD. b. Hailey and the Dog.
b