The correct answer is D. The Pure Food and Drug Act.
Explanation:
In 1906, Upton Sinclair wrote the famous novel called "The Jungle". This novel exposes the deplorable working conditions in the meat-packing industry. So, this novel raised awareness to the people that plants were dirty and really dangerous which threaten the inhabitants. Thus, the federal government intervened and regulated the food industry with the passing of the Meat Inspection Act of 1906 and the Pure Food and Drug Act of 1906.
