The essential difference between a command economy and a market economy is that in a market economy

a
the prices of products and resources are largely determined by government regulation of businesses.
b
buyers and sellers determine resource allocation.
c
central planning creates an effective incentive system for consumers and producers.
d
shortages occur more often than surpluses.

b  buyers and sellers determine resource allocation.

Explanation:

The market is regulated by the interaction between Sellers and Buyers. However, in a Command economy the market is regulated by the government policies.

the answer is "b.the increased supply will create a surplus. "

the essential thought behind price controls is straightforward - utilize the power of law to modify the equilibrium of a market. for instance, the legislature may choose that the steel business needs to survive, and in this way pass a law to set a value floor on steel. this implies all steel sold must offer at or over the floor value, which must be set over the equilibrium cost for it to have any impact. the switch could likewise happen - the administration can choose that steel is excessively costly and set a value roof underneath its equilibrium value, with the goal that all steel must be sold at or beneath that ceiling.