Who is the author of the book "The Jungle," which influenced food safety regulations?

"The Jungle," authored by Upton Sinclair, is a significant work of literature that played a crucial role in exposing the unsanitary conditions in the meatpacking industry in the early 20th century. Published in 1906, the novel vividly details the hardships faced by immigrant workers in Chicago and highlights the appalling practices that endangered public health, including the contamination of food products.

Sinclair's intent was to promote socialism and draw attention to the struggles of workers, but the impact of his work was felt even more strongly in the realm of food safety. The public outcry following the book's publication led to increased scrutiny of food production practices. This ultimately contributed to the passage of the Meat Inspection Act and the Pure Food and Drug Act in 1906, which were landmark laws aimed at ensuring safe and sanitary conditions for food processing.

The other figures mentioned in the choices—Jacob Riis, Jane Addams, and Ida Tarbell—were also influential reformers of their time, addressing issues like urban poverty, social justice, and corporate monopolies, but none directly authored "The Jungle." Riis is known for his work on urban poverty, Addams for her work in social reform and the settlement house movement, and Tarbell for her