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: Tom called customer support for his cell phone provider. Sentence 2: Tom received excellent service. Sentence 3: Tom wanted to somehow thank the customer service associate. Sentence 4: At the end of the call, Tom was asked to complete a survey. Sentence 5: Tom took the survey and gave a positive review. Choices: a. Survey. b. Messy Birds.

a