Question

what establishes the structure of local government?
the state constitution
the county charter
the u.s. constitution

Explanation:

In the United States, local government structure (like counties, municipalities) is established by the state constitution. The U.S. Constitution focuses on federal and state - federal relations, and a county charter is more about governing a specific county's operations rather than establishing the overall local government structure framework.

Answer:

A. the state constitution