Which grocery store chain pioneered the modern self-service supermarket concept in 1916, allowing customers to select their own items rather than asking clerks?

The modern supermarket experience we take for granted today was once a revolutionary concept. Before self-service grocery stores became the norm, shopping for food involved telling a clerk what you wanted from behind a counter. This poll tests your knowledge about a pivotal retail innovation that transformed how we shop for food forever.

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Piggly Wiggly
A&P (Great Atlantic & Pacific Tea Company)
Kroger
Safeway