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: Ida decided she wanted a saltwater fish tank. Sentence 2: She thought saltwater fish were so beautiful! Sentence 3: Then she did some research about setting up a tank. Sentence 4: The process was expensive and very, very difficult! Sentence 5: Ida decided a saltwater tank wasn't worth the effort, after all. Choices: a. Tank. b. Bridge Collapse.

a