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: We were out all day yesterday. Sentence 2: The heat made me tired. Sentence 3: I could barely function. Sentence 4: So when we got to the house I slept. Sentence 5: I had a long nap. Choices: a. Too tired to function. b. Trust.

a