Which upton sinclair muckraking masterpiece is credited with spurring the passage of the pure food and drug act?

Prior to 1906, there were no laws at all on foods or drugs. As a decision, control drugs usually included morphine, heroin, and cocaine in meaningful quantities. There were no labeling conditions so people didn't even know what they were taking. There were no purity conditions and no limitations on posting. Drug makers could demand that their solution could heal whatever ails you or your donkey and they often did. As a conclusion of these problems, the Pure Food and Drug Act was passed in 1906.

all of the choices are correct

number 1 is a)