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: Gary felt he could pay off his mortgage quickly if he got roommates. Sentence 2: Gary placed an ad on Craigslist looking for roommates. Sentence 3: After screening roommates, Gary choose two individuals. Sentence 4: After they moved in Gary and his roommates became acquainted. Sentence 5: Gary was glad with the decision he made to get roommates. Choices: a. New Roommates. b. Gas.

a