What was the result of Upton Sinclair's novel?

immigrant workers were able to unionize and working conditions improved

PETA was formed in 1907

the government passed two pieces of legislation to regulate the processing of meat

Roosevelt demanded a recall of the books from public libraries

the third one the meat processing

Option C.

Explanation:

The government passed two pieces of legislation to regulate the processing of meat, is the right answer.

Upton Sinclair's was a Muckraking Journalist from America. His socialist policy urged him to write "The Jungle", a Novel in the year 1906. This novel displayed the severe conditions and exploited lives of the settlers, essentially in the Meatpacking industry of the U. S. The result or impact of his writing can be seen in the fact that it created a public disturbance and led the government to pass the "Pure Food and Drug Act and the Meat Inspection Act".