Which famous military product innovation was introduced in 1941, featured multiple components including cigarettes, and was nicknamed after its inventor?

Throughout military history, feeding troops effectively has been crucial to battlefield success. During World War II, a revolutionary combat ration was introduced that changed how soldiers were fed in the field. This product innovation addressed nutritional needs, portability, and shelf-life concerns that had plagued armies for centuries. Test your knowledge about this significant development in military logistics that influenced both warfare and later civilian food technology.

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The K-ration, named after Dr. Ancel Keys who developed the lightweight combat ration
The C-ration, named after Colonel Carl Clifford who designed the canned combat meals
The D-ration, named after Major David Davidson who created the emergency chocolate bar
The M-ration, named after General Marshall who commissioned the portable meal system