Why did buying on margin contribute to the great depression?

a) buying on margin meant that banks could charge investors huge interest rates. b) buying on margin caused stocks to be valued at a price higher than their actual value.
c) buying on margin led to congress passing higher taxes, burdening american consumers

He seventeenth amendment to the us constitution calls for the direct election of all us senators. this means that the people of each state get to vote to decide who will be their two us senators. before this, the legislatures of each state chose the two us senators from that state with no direct involvement of the average voter. why would this amendment be considered a reform? how would it benefit the people? even today some people claim that the seventeenth amendment was a bad idea. what arguments could be made for reverting selection of us senators back to the state legislatures?

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.

The unalienable rights of life, liberty and the right to own property acknowledge the importance of the ? a. king. b. individual. c. military. d. community.