Final answer:
The publication of Upton Sinclair's 'The Jungle' led to the passage of the Pure Food and Drug Act after it exposed unsanitary conditions in the meatpacking industry, sparking public demand for government regulation of food and drugs. Hence, option (b) is correct.
Step-by-step explanation:
The public's response to Upton Sinclair's novel The Jungle helped bring about the passage of the Pure Food and Drug Act. After the novel revealed the unsanitary conditions and unethical practices in the meatpacking industry, there was widespread public outrage. President Roosevelt then appointed a commission, which confirmed Sinclair's findings, leading him to support the enactment of the Pure Food and Drug Act and the Federal Meat Inspection Act in 1906.
The Pure Food and Drug Act prohibited the sale of adulterated or misbranded foods and drugs and led to the creation of the U.S. Food and Drug Administration (FDA). Sinclair's intent was more focused on promoting Socialism and the plight of workers, but the public was most affected by the food safety issues his novel highlighted.