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'.
Q: Sentence 1: Jimmy wanted to go to the playground. Sentence 2: When he got there, he went down the big slide three times. Sentence 3: He saw some friends in the sandbox and joined them. Sentence 4: After a few sand sculptures, he played on the swings. Sentence 5: He got tired after an hour and ran home to take a nap. Choices: a. Playground. b. A Change.
A:
a