Answer:A. commercial enterprises, governmental organizations, and institutions.
Explanation: Business market is a combination of different commercial enterprises, Government and other institutions that are involved in the over management, regulation and control of Businesses.
Commercial enterprises are enterprises involved in the trading of goods and services,they carry out the buying and selling.
Government are part of the business Market,they take part by regulating the commercial enterprises and also patronize them.
Institutions are formal or informal take part in the business Market.