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: The forum changed suddenly one day. Sentence 2: I didn't expect it when I logged in. Sentence 3: Everyone suddenly decided to leave, and posted saying so. Sentence 4: We followed to the new forum. Sentence 5: All the drama was finally over so we could work. Choices: a. Sunburn. b. New Forum.

b