D. Plains Indians started hunting buffalo more efficiently.
This helped them move more accessibly throughout the land.
The correct answer would be A, the U.S. Senate didn't want the league of nations to tell it what to do.
Amendments, the Fourteenth Amendment to the U.S. Constitution dealt most directly with the outcome of the Civil War and the condition of the freed people.
On July 28, 1868, the 14th Amendment to the United States Constitution was ratified. The amendment grants citizenship to "all persons born or naturalized in the United States" which included former slaves who had just been freed after the Civil War.
This most likely affected the White men who had slaves to do their Farming, this would cause them to come behind on their crops because they arent used to doing their own work.
The best way to measure public opinion is through opinion polls - B
With opinion polls you get an idea what is the general idea about a certain topic from the public, as you usually get a high enough sample to deduce the relevant information.
To answer your second question I would say it is either B or C as being a sole proprietor usually makes you subjec to being a small business or you're forced to use factors of production less efficiently.
by protecting the Constitution through amendments
approving presidential appointments
