Concept:Central government control over local government is exercised through designated supervisory authorities.
Explanation:Local governments operate under the oversight of the central government.
The ministry or institution responsible for local government serves as its supervisory authority.
This supervision forms the identifiable sphere of control exercised by the central government.
It is not limited to courts, audits, or appointments alone, but covers overall administrative guidance and direction.
Therefore, this type of control is known as supervisory control.
Answer:A. Supervisory Control