Upton sinclair wrote the jungle in 1906. his efforts bring an investigation into the meat packing industry, which eventually led to: . congress passing the pure food and drug act and meat inspection act. congress passing anti-trust laws for meat manufacturing plants. the beginning of conservation efforts in the us and abroad.

The answer is A.  Congress passing the Pure Food and Drug Act and Meat Inspection Act. Originally, the book the Jungle aimed to deal with the growing economic slavery that many immigrants in the US were suffering at that time. However, it accidentally made an impact on the meat trade in the US. In the story, one of the characters had died because of the unfavorable working environment in the meat industry in Chicago