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: Rebecca and her friends went on a camping trip. Sentence 2: When night fell, her friends all wanted to start a campfire. Sentence 3: They quickly discovered that no one knew how to build one. Sentence 4: Rebecca proudly revealed that she knew how to build a campfire. Sentence 5: She started the fire with ease, to the amazement of her friends. Choices: a. Campfire. b. Missed It.
a