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'.

Sentence 1: One day Lidia found herself sneezing more often than usual. Sentence 2: She realized it was because her fan had become rather dusty. Sentence 3: She took the fan apart to clean it out, sneezing as she did. Sentence 4: She sneezed so hard that one of the screws rolled away and was lost. Sentence 5: Lidia bought a new fan, and hasn't sneezed since. Choices: a. Gross Hot Dog. b. The Dusty Fan.
b