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: The steering wheel in Eli's car was disgusting. Sentence 2: It was breaking up and melting in the heat. Sentence 3: It would get tar-like stuff on his hands when he drove it. Sentence 4: Eli bought and installed a leather wheel cover. Sentence 5: The problem was entirely solved and Eli had no more wheel concerns. Choices: a. Wheel Cover. b. The Shadow.
a