The united states economy is one in which producers are generally free to produce what they want, and
consumers are free to purchase what they desire, so long as no laws are broken. at the same time, however,
the government does regulate some aspects of the economy. the united states can best be described as a
a liberated economy
ob market economy
oc command economy
od mixed economy

D mixed economy

Explanation:

A mixed economy combines the aspects of a  free market an those of a command economy.  The mixed economy gives buyers the freedom to choose what they want. Entrepreneurs choose where to locate their business,  its type, and the quantities to supply.

The governments play a regulatory role in the economy. It protects the rights to own properties and enforces contractual agreements.  The governments intervene in provisions of public goods such as roads, hospitals, and ports.

A mixed economy will comprise both private and government doing business. Citizens are free to make economic decisions and own the factors of production. The government is mainly the regulator and provider of social services.

corrosion is a natural process, which converts a refined metal to a more chemically-stable form, such as its oxide, hydroxide, or sulfide. it is the gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment.

explanation:

answer; it can vividly demonstrate product attributes and persuasively explain their corresponding consumer benefits;