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: One day in winter a black dog wanders up to the business. Sentence 2: She is very friendly and doesn't leave to go home. Sentence 3: Wendy couldn't leave her outside in the cold so took her in. Sentence 4: Wendy tried to find her owners but never could. Sentence 5: Wendy adopted the dog and named her Kat. Choices: a. Kat finds a home. b. Twins.

a