Which of the following was an effect of upton sinclair’s novel the jungle?

a. the food and drug administration (fda) was created. b. factor inspections decreased.
c. it caused riots in new york, chicago, and los angeles.
d. it led to the impeachment of president theodore roosevelt.

Instead of helping out the working class, the book made the public aware that the plants were filthy and dangerous, posing a threat to the public.  Therefore, this made it possible for the federal government to intervene and regulate the food industry with the passing of the Meat Inspection Act of 1906 and the Pure Food and Drug Act of 1906. 

Considering this, I believe the answer is A.