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.
The correct answer is "hostilities between American Indians and the Colorado militia."
The Wounded Knee Massacre, which occurred in 1890, was a confrontation between Native Americans who belonged to the Minincojou and the Hunkpapa Lakotas and the Colorado Militia, led by Colonel James Forsyth.
As a result of this battle, nearly 300 Native Americans and 25 American soldiers died. In 1990, the US Congress passed a resolution expressing a "deep regret" for the massacre.
The caste system is one ancient Hindu belief that still affects modern-day India. Although, it is no longer enforced in modern-day India but the idea of it is still thrown around. I hope I helped in some way, you should look into it a little more so you can have reasons how and why it make still be thrown out there, and how it is still present in modern-day India.
Ulysses S. GrantGeneral Ulysses S. Grant led the Union Army during the later years of the civil war, and later became the President of The United States.
