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: Tim decided to make a bag of popcorn. Sentence 2: The bag was inside a box on his shelf. Sentence 3: He opened the box and took out a bag. Sentence 4: He read the instructions and put the bag in the microwave. Sentence 5: A minute later he was rewarded with the delicious smell of popcorn. Choices: a. Mountain. b. Popcorn.

b