Part of the reason for the stock market crash was: the tax policies of the 1920s, which especially hurt the wealthy who might otherwise have brought more stocks. the buying of great amounts of stock "on margin“ (using borrowed funds). the low tariff, which allowed imports to corner several important american markets. none of the above

The correct answer should be the buying of great amounts of stock "on margin“ (using borrowed funds). 

People believed that stocks would keep growing indefinitely so they borrowed money to purchase more stocks. When the stocks couldn't grow as fast as the deadlines for returning money, people started losing large amounts of money and destroying the economy which lead to the Great Depression.

1920 census

the census was scheduled for january the 1st, as the government believed that more farmers would be in their homes by that time instead of april. the census did not ask about unemployment, the number of children, and how long was a couple married were not taken into consideration. individuals were considered as residents of the places they normally slept, not the places were they worked at or visited.

2010 census

the census was scheduled for april 1st, 2010. it was the shortest census in history: it only contained 10 questions related to name, age, gender, ethnicity, relationship, and whether the citizen owned a home or rented one. the government launched a website in order to provide the citizens with information regarding the census. there were also "teach census weeks" in schools nationwide.