The correct answer is D) Slaughterhouse conditions were even worse than Sinclair had reported.
Upton Sinclair wrote about the horrible conditions of the meat packing industry in his famous fictional novel The Jungle. Even though this book followed the story of a made up family, Sinclair based his experiences on his actual life when he worked in Chicago's meatpacking district. To see if these conditions were actually happening, the government sent inspectors into meat packing plants all over the US. After seeing the disgusting conditions, president Teddy Roosevelt passed the Meat Inspection Act of 1906. This would help to ensure safe and healthy working conditions.