The correct answer is D) head of state.
A head of state directly messaged a country by making decisions and wielding power.
The head of a state is the most important figure in the country's government. In some countries, it is called the President in others the Chancellor, in others, the Prime Minister. He or She is the one who makes decisions on important issues such as politics, economy, security, foreign issues or trade.
The other options of the question were A) government. B) monarchy. C) theocracy.