Given the task definition and input, reply with output. 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'.

Sentence 1: There was an ninety percent chance of snow Tuesday night. Sentence 2: Eric didn't bother to study for his history test. Sentence 3: When he woke up the next morning he hoped the forecast had been right. Sentence 4: He looked outside where everything was covered in snow. Sentence 5: He decided to play for awhile but knew he had to study that night. Choices: a. Birthday Present. b. Snow day.
b