Which list shows forms or systems of government from the least power for the people to the most?

The following is the list government from the least power for the people to the most :

Autocracy,

Oligarchy,

Democracy.

Explanation:

Autocracy means Government Itself. Autocracy is Greek word. It is a political regime in which laws and decision are based  on the ruler's convictions.In this power of leader is absolute and unlimited.

Oligarchy is also a Greek term  which means Government of Few. and that designates a political system in which power is concentrated in a small group belonging to same family , same political party or economic group.

Democracy is also from Greek word WHICH meaning A political system power is exercised by people which elect any individual through voting by people as its Government .

i think it's a)sparta

according to my calculation, the answer is d.