Which retail innovation was first introduced by Clarence Saunders in 1916, fundamentally changing how consumers interacted with products?

Throughout history, retail innovation has transformed how people shop and how merchants sell. From the ancient bazaars to today's digital marketplaces, technological and conceptual breakthroughs have shaped commerce in profound ways. This trivia question explores a pivotal retail innovation that changed shopping habits and retail strategy forever. Test your knowledge of retail history!

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Self-service grocery stores (Piggly Wiggly)
Department store loyalty cards
Cash register with printed receipts
Catalog shopping with mail delivery