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: Rick and Carl wanted to explore a dangerous part of town. Sentence 2: But quickly, they began feeling scared. Sentence 3: They walked towards a freeway underpass. Sentence 4: But a homeless man began yelling at them. Sentence 5: And Rick and Carl were too frightened to explore anymore. Choices: a. Explore. b. Chairman.

a