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: Cathy realized that her current fish tank was way to small. Sentence 2: Cathy knew she had to purchase a much larger fish tank. Sentence 3: After conducting research, Cathy found a tank at a local pet store. Sentence 4: Cathy decided to drive to the store to purchase the tank. Sentence 5: Cathy was glad with the purchase of her larger fish tank. Choices: a. Fish Tank. b. The Beach.

a