A

The correct answer is D (theocracy and communism) because the definition of an oligarchy is when a group of people rules over a majority.

Explanation:

The Greek philosopher Plato outlined five government types: aristocracy, timocracy, tyranny, democracy, and oligarchy. In this type of government, there is a lessened degree of citizen participation, and it may often revert to an autocracy-like oligarchy due to potential nepotism and its unitary model of government offices.

Thus, despite the radical differences between theocratic and communist governments due to being two different types of state. Nonetheless, they are both examples of a small body of people, such as priests, creating laws.

Monarchies and dictatorships, as the other two forms of government mentioned, are not correct choices as they rely on the guidance of a single ruler, for example, a king or a revered leader.

Oligarchy and people picture.
Oligarchy Is the Rule of the Few over the Many (Source: https://www.austinchronicle.com)