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: Arthur sat down to read a book and relax. Sentence 2: He heard a knock on the door. Sentence 3: Arthur put down his book and answered. Sentence 4: It was Jehovah's Witnesses. Sentence 5: Arthur explained it was 10 pm, and closed the door. Choices: a. JW. b. Multivitamin.

a