Answer:
As a result of muckraking by Sinclair, Americans saw progress in terms of increased awareness of the dangers and injustices present in society. Sinclair's investigative journalism exposed corruption and abuse in industries such as meatpacking, oil, and politics, leading to public outrage and calls for reform. This resulted in changes such as the passage of the Pure Food and Drug Act and the Meat Inspection Act, which improved food safety and working conditions. Americans saw "progress" in the sense that these changes addressed and improved upon issues that had previously gone unchecked.