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: I was browsing the internet last night. Sentence 2: I read a very interesting article about conserving power. Sentence 3: I took the article to heart and decided to make some changes. Sentence 4: I bought new light bulbs and now I turn the lights off when I leave. Sentence 5: I really think those changes will make an impact on the world! Choices: a. Raking leaves. b. Browsing the internet.

b