Answer:
Buying on margin helped bring about the Great Depression because it helped to cause Black Tuesday when the stock market crashed. ... They could not repay their loans because the stock prices had not risen. When they could not repay their loans, they went broke. Because so many people could not repay loans, banks failed.
Explanation:
The secret police attempted to identify citizens who opposed the Communist Party and who could undermine it.
http://www.polytechpanthers.com/ourpages/auto/2012/1/24/45532409/ItalyandGermanyafterWWI.pdf
Answer:
They were partitioned into tenement houses
Owners gained a great deal of money
Poor immigrants moved into these homes.
Explanation:
B. helped prevent and cure diseases like tuberculosis and polio.