Ais an economy in which private enterprise exists with considerable government regulation.
a. market economy.
c. centrally planned economy.
b. mixed economy.
d. traditional economy.

Mixed economy.

Explanation:

Mixed economy is a system in which the planned production processes operate simultaneously, when the state acts as an actor - acting directly in production - but also the model of market production, when there is production carried out by private initiative. In a mixed economic system, state action occurs through state-owned enterprises. In addition, the State also acts as a regulator of private activity, in order to maintain a healthy environment for economic transactions.

the united states constitution is the supreme law of the united states. the constitution, originally comprising seven articles, delineates the national frame of government. its first three articles embody the doctrine of the separation of powers, whereby the federal government is divided into three branches: the legislative, consisting of the bicameral congress; the executive, consisting of the president; and the judicial, consisting of the supreme court and other federal courts. articles four, five and six embody concepts of federalism, describing the rights and responsibilities of state governments, the states in relationship to the federal government, and the shared process of constitutional amendment. article seven establishes the procedure subsequently used by the thirteen states to ratify it. it is regarded as the oldest written and codified national constitution in force.