Which breakfast cereal was the first to be fortified with vitamins and minerals, creating the 'nutritionally complete' breakfast category in the 1940s?

In the competitive world of breakfast cereals, one innovation in the 1940s revolutionized how Americans started their day and created an entirely new category of products. This poll tests your knowledge of iconic food product innovations that transformed industries and consumer habits. Do you know which pioneering breakfast product broke the mold and created a billion-dollar segment?

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

Cheerios (originally called 'Cheerioats')
Kellogg's Corn Flakes
Post Grape-Nuts
General Mills' Kix