The correct answer is A. administration.
Administration is the process of managing and organizing a group of people or resources to achieve a specific goal. It is a key function of any organization, and it is essential for the efficient running of a state.
Democracy is a form of government in which the people hold power. It is characterized by free and fair elections, the rule of law, and the protection of human rights. Democracy is not necessarily efficient, as it can be slow and cumbersome to make decisions.
Policy is a set of principles or guidelines that guide the actions of a government or organization. It is important for the efficient running of a state, but it is not the same as administration.
Autocracy is a form of government in which one person holds all power. It is not efficient, as it is often based on personal whim and does not allow for the input of others.
Plutocracy is a form of government in which the wealthy hold power. It is not efficient, as it is often based on self-interest and does not allow for the needs of the majority to be met.
In conclusion, the correct answer is A. administration.