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: Marissa is turning 16 this year. Sentence 2: Her parents are planning a sweet 16. Sentence 3: They are going to surprise Melissa. Sentence 4: Then they will holding the party at their house. Sentence 5: The party was a success Marissa was in shock with her party. Choices: a. Marissa's Surprise. b. Bad babysitter.

a