A secondary source is a document or recording that relates or discusses information originally presented elsewhere. Such as a magazine, textbook, or book-review
Secretary of State: Alexander Hamilton
<span>Demparment of Foreign Affairs: Thomas Jefferson</span>
The correct answer is: "a school board that oversees public education for several communities".
A special-purpouse district, within the US administration, is a goverment unit created to serve a specific objective and separated from local goverments, such as those which govern a town, city, county, etc, hence enjoying administrative and fiscal independence. For instance, school boards are one example as they are fully dedicated to the educative function and other aspects related to it.
The Supremacy Clause of the United States Constitution (Article VI, Clause 2) establishes that the Constitution, federal laws made pursuant to it, and treaties made under its authority, constitute the supreme law of the land