Key differences between national law and international law include which of the following terms?

Group of answer choices

National law can be enforced by government authorities.

International law includes written and unwritten laws observed by independent nations.

International law is enforced primarily for reasons of courtesy or expediency.

National law can be enforced by government authorities, and international law is enforced primarily for reasons of courtesy or expediency.

National law can be enforced by government authorities, and international law includes written and unwritten laws observed by independent nations.