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: Don and his son James rented a cabin in the woods for their vacation. Sentence 2: They arrived at the cabin late at night and crawled into bed. Sentence 3: James started to scream that he saw a hand through the window! Sentence 4: Don went outside to investigate the mysterious hand. Sentence 5: There was nothing outside of the window but branches. Choices: a. Space Mountain Sickness. b. The Mysterious Hand.

b