The Three Kinds of Information Technology Used by Executives,managers,and Workers

Multiple Choice

The three kinds of information technology used by executives,managers,and workers inside a company to access and share information are: 

A)  ​executive information systems, portals, and intranets. 
B)  ​local area networks, extranets, and management control systems. 
C)  ​electronic data interchange, web services, and extranets. 
D)  ​expert systems, decision support systems, and virtual private networks.