Given the task definition and input, reply with output. 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: Lacey just bought new nail polish. Sentence 2: She was painting her nails when her dog came running. Sentence 3: Her dog knocked over the bottle and it shattered on the floor. Sentence 4: Lacey was not able to get the stain out. Sentence 5: She now has a bright blue spot on her kitchen tile. Choices: a. Needing a dress.. b. Nail Polish.
b