MARK!!!!!!!!!!!!! is the awnser
Answer:
B.
make room for expanding white settlement in the eastern United States.
Explanation:
They didnt invent the astrolabe!
A lot of people invested in the stock market in the 1920s because they could buy stocks 'on the margin', and hence, required little initial capital. 'Buying on margin' means that you leverage an asset by borrowing money from a lender.
During the American Revolution, blacks fought on the North Side of the war because they wanted to be free. The North was for freedom of slaves and the South opposed that.