Which of the following contributed to the collapse of command economies in communist states around the end of the cold war? a. they created problems, such as high unemployment, by reducing government spending.
b. they prevented the government from regulating employee safety and pollution.
c. they failed to produce enough consumer goods, including food, for their citizens.
d. they allowed wealthy factory owners to exploit their lower-class workers

yes

explanation:

it was on the rise and doing very well and would continue to do well until the great depression from 1929-1939

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

the answer i chose to believe is 'harmony'