Answer:
A. Model T Ford
Explanation:
The Model T Ford was produced from 1908 to 1927. It was the first affordable automobile, due to the use of assembly line production instead of individual hand-crafted work. Because it was so affordable, it caused a major shift in Americans' living patterns in the 1910s. It allowed more Americans to get from one place to another quickly.
I would say c limited slave trade between Africa and the colonies :)
The pentagon papers is a report of the Department of Defense detailing the involvement of the United States' military on Vietnam from 1945 to 1967. The papers were first brought to public by the New York Times in 1971. The papers showed that the Johnson administration had lied about the scope of its actions in the Vietnam War.