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: Cabot and her dad headed out on a bike ride. Sentence 2: They decided to explore a nearby park. Sentence 3: They had never been to this park before. Sentence 4: They rode through the park all the way down to the river. Sentence 5: They had so much fun that they decided to return the next day. Choices: a. A long bike ride.. b. Scavenger.

a