Final answer:
Stock car racing surged in popularity post-World War II, reflecting a greater leisure culture and consumerism with cars reaching 200 mph.
Step-by-step explanation:
After World War II, stock car racing gained popularity in the United States as part of a broader increase in leisure activities. Cars, often emblazoned with numerous ads, could reach speeds of 200 mph. The sport was part of a broader cultural shift towards consumerism and advertising, which was also reflected in other leisure activities such as movies, radio, and the increasing popularity of professional sports.
This unique marketing approach not only generated revenue for the sport but also added a colorful and visually dynamic aspect to NASCAR races. The proliferation of ads on a single jacket became emblematic of NASCAR's ability to blend speed, competition, and commercial interests, contributing to its popularity and success in the American sports landscape.