What was a significant outcome of the public's response to the findings in Upton Sinclair's "The Jungle"?

The significant outcome of the public's response to Upton Sinclair's "The Jungle" was the establishment of the Food and Drug Administration (FDA). "The Jungle," published in 1906, exposed the horrifying conditions in the meatpacking industry in Chicago, highlighting unsanitary practices and the neglect of worker welfare. The vivid descriptions of contaminated meat and the lack of regulatory oversight led to widespread outrage among the public.

This backlash prompted a demand for reform in food safety laws and legislation. In response, the federal government acted by passing the Pure Food and Drug Act and the Meat Inspection Act in the same year. These laws aimed to ensure safer food and drug products for consumers and the establishment of the FDA was a key step in enforcing these regulations.

The FDA was created to oversee food safety and ensure that products were labeled correctly and safe for consumption. Therefore, the correct answer reflects the direct consequence of the public's reaction to the issues raised in Sinclair's work, leading to substantial reforms in the food industry and the creation of a regulatory body to protect consumers.