Final answer:
The Pure Food and Drug Act of 1906 is the correct answer; it required drug manufacturers to list ingredients in their products, forming the basis of the modern Food and Drug Administration and setting the stage for future food and drug safety regulations. The correct answer is option a) Pure Food and Drug Act.
Step-by-step explanation:
It was not until the Pure Food and Drug Act of 1906 that manufacturers of drug products had to list the ingredients in their products. The correct answer to the question is a) Pure Food and Drug Act. This act established federal standards of inspection and sanitation on meatpackers and required drug makers to list ingredients in their products.
The Pure Food and Drug Act was part of broader Progressive Era reforms and was inspired by muckraking exposés about the unsafe and unregulated conditions of food and medication, which included the alarming practices in the meatpacking industry, as reported by Upton Sinclair in 'The Jungle'.
Not only did the act lead to the creation of the Food and Drug Administration (FDA), but it also set the precedent for future legislation aimed at ensuring the safety and efficacy of food and drugs. The correct answer is option a) Pure Food and Drug Act.