Final Answer:
The federal government began to regulate businesses in the United States in the 19th century. Option B is answer.
Step-by-step explanation:
Historical Context:
The Industrial Revolution and rapid economic growth in the late 19th century led to concerns about monopolies, unfair business practices, and the need for worker protection.
This prompted the federal government to enact regulations aimed at ensuring fair competition and protecting consumers and workers.
Key Milestones:
1887: Interstate Commerce Act established the first independent regulatory commission to oversee railroads.
1890: Sherman Anti-Trust Act prohibited monopolies and unfair business practices.
1906: Pure Food and Drug Act and Meat Inspection Act aimed to ensure food and drug safety.
1914: Federal Trade Commission Act created an agency to investigate and prevent unfair business practices.
Therefore:
Based on these historical events, it is clear that federal regulation of businesses began in the 19th century, not the 18th, 20th, or 21st century.
Therefore, option B. "The federal government's regulation of businesses in the U.S. began in the 19th century." is the correct answer.