D
Test question analysis: In the UK, the king is the head of state and represents the country, so it should be submitted to the king. The Prime Minister is the head of the Cabinet; the Foreign Secretary is the administrative official in charge of diplomacy, and the Cabinet is an administrative agency, so ABC is incorrect, the answer is D
Comments: The UK is a constitutional monarchy, and the king has no real power when he rules but is not a country. The head of state represents the country to the outside world. The characteristics, established symbols, and development process of the British constitutional monarchy all need to be mastered.