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: Alexa is very technologically savvy. Sentence 2: She is constantly learning about new technology and practices. Sentence 3: She decides to use her knowledge to create an app. Sentence 4: Alexa's app is very easy to use and free. Sentence 5: Her app becomes the most downloaded in a matter of weeks. Choices: a. Alexa's App. b. Mechanic.

a