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: My dad gave my brother and I his old metal boat to play with. Sentence 2: We turned it over on the grass. Sentence 3: We filled it with water from a hose. Sentence 4: We stripped down to our underwear and played in the boat water. Sentence 5: Eventually we got tired of it and started putting goldfish in it. Choices: a. Boat. b. Sad Sister.
A:
a