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: Mindy worked in an office. Sentence 2: She was responsible for making the coffee in the morning. Sentence 3: Mindy noticed that the coffee was running low. Sentence 4: She bought some coffee on her way to the office. Sentence 5: The office reimbursed her purchase. Choices: a. Coffee. b. Surfing.

a