With which countries are FCC-licensed amateur stations prohibited from exchanging communications?

The correct response highlights that FCC-licensed amateur stations are prohibited from exchanging communications with any country whose administration has formally notified the International Telecommunication Union (ITU) of its objection to such communications. This provision is in place to maintain international relations and respect the sovereignty of countries that do not wish to receive amateur communications.

The ITU serves as a global coordinating body that helps manage telecommunications and ensures that all nations can participate peacefully and without interference. When a country issues such a notification, it reflects its legal stance, and amateur operators are required to comply with these regulations to uphold the integrity of international agreements.

The other options involve concepts about hostilities or other legal frameworks but do not directly relate to the established protocol of notifying the ITU, which is the standard point of reference for maintaining international communication norms in amateur radio operations.