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: Carl was shopping for an apartment. Sentence 2: He found a building that he liked with two openings. Sentence 3: One was on the first floor and one was on the fourth. Sentence 4: He selected the one on the fourth floor as he thought it'd be safer. Sentence 5: Carl regretted the decision upon learning there was no elevator. Choices: a. Fourth Floor. b. Political Message.

a