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: Oscar was a very creative and artistic child. Sentence 2: His mother wanted to help nurture that creativity. Sentence 3: Oscar's mother bought him some sidewalk chalk. Sentence 4: Oscar used his sidewalk chalk creatively and made many drawings. Sentence 5: Oscar continued making artwork as he grew up. Choices: a. New Zone. b. Oscar the Artist.
b