What economic characteristic of the 1920s was a cause of the Great Depression?

high income tax rates
low tariffs on imported goods
overproduction of agricultural products
lack of available credit

Plz ? ? 20 points for this question ! hhjc6

How does a comet change when it comes close to the sun

How are the republican and democratic presidential candidates chosen? a. they are nominated by their state governments. b. each is nominated by his or her respective party. c. each is chosen by the governor of his or her home state. d. they are chosen by the house of representatives.