Which breakfast cereal innovation first introduced the concept of 'fortified with vitamins and minerals' as a major product design and marketing strategy, revolutionizing how nutritional benefits were advertised in food products?

Breakfast cereals represent one of the most competitive and innovative segments in the food industry. With changing consumer preferences toward healthier options and sustainability, major cereal manufacturers have been forced to adapt their product design and marketing strategies. This poll tests your knowledge about a significant product design shift that changed the breakfast cereal landscape and influenced an entire industry's approach to nutrition marketing.

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Post Grape-Nuts (1949) with added vitamin D
Kellogg's Rice Krispies (1953) with added B vitamins
General Mills' Cheerios (1941) with added thiamin
General Mills' Kix (1937) with 'BN fortification' adding thiamin, niacin, and iron