A(n) performs very businesslike duties, but is owned by the government and keeps all profits earned.

a. independent regulatory agency
b. government corporation
c. independent executive agency
d. cabinet department

B. government corporation

Explanation:

A government corporation is an agency that conducts business and is organized like a private corporation (with a board of directors and a general manager). Moreover, it generally charges for the services it provides. However, the organization receives public funds to serve a public purpose and depends, to varying degrees, on the government. A well-known example is the U.S. Post Office.

byzantine empire is the answer i think you are looking for.

hope this : )