Producer surplus: a. is the difference between the maximum price consumers are willing to pay for a product and the lower equilibrium price.
b. rises as equilibrium price falls.
c. is the difference between the maximum price consumers are willing to pay for a product and the minimum price producers are willing to accept.
d. is the difference between the minimum price producers are willing to accept for a product and the higher equilibrium price.

the answer would be voluntary exchange -

"the act of buyers and sellers freely and willingly engaging in market transactions. moreover, transactions are made in such a way that both the buyer and the seller are better off after the exchange than before it occurred."

hope this : )

-shy

answersupplies;

-the personal ownership of property

-the influence of consumer demand

explanation:

the command economy prohibits the personal ownership of property.

basically, command economy is defined as the system where a nation’s government is the one that makes all the decisions when it comes to its economy. the government is the one who controls the production of goods and services and regulates the prices and salaries.

therefore, since that the government is the authority, then all kinds of personal ownership of property is prohibited by them.