1. What practice did a number of Americans participate in during the 1920’s that will hurt them once the stock market crashes? A.) Savings
B.) Checking
C.) Margin Buying
D.) paying in cash

C

Explanation:

Margin Buying is literally taking loans, which causes people to not save money and to always be in debt. So, that was the downfall of the economy at that time. (hope this helps :3)  

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.