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: Olga was an excellent speller. Sentence 2: She won every spelling bee she entered. Sentence 3: She studied really hard and worked her way up to nationals. Sentence 4: She struggled a few times but still ended up being a finalist. Sentence 5: She finally won the national spelling bee and was very proud. Choices: a. Olga's Orthographic Occasion. b. Give up on Sleep.
a