Answer:
10. C) Civics
The world "civics" comes from Latin, and means "what is related to the citizen". Civics studies all that is related to the quality of being a citizen: the duties of a citizen, the rights, and how a citizen can participate in the republic.
21. B) As a response to concerns of the Anti-Federalists
James Madison wrote the first twelve amendments to the U.S. Constitution out of the concerns that were expressed by the Anti-Federalist about the Constitution and the supposed lack of limits that the Federal Government had.