What is Denny's profession?

Denny's profession encompasses multiple roles, which is why "All of the above" is the correct choice. He is primarily portrayed as a professional racecar driver, which is central to the narrative, showcasing his skills and experiences on the racetrack. Additionally, he has a background that includes working at a German auto shop, which emphasizes his deep connection and understanding of automobiles. Furthermore, Denny also serves as a high-performance driving education instructor, highlighting his expertise in teaching others about driving techniques and safety. This multifaceted approach to his career adds depth to his character and illustrates the varied aspects of his life in relation to racing and automobiles. Each of these roles contributes to the overarching theme of the story, which revolves around the bond between Denny and his dog, Enzo, and their shared experiences in the racing world.