A type of government in which people rule themselves is a Democracy. The correct option in regards to the given question is option "C". Democracy is the form of government where the rulers are elected by the common people based on their own thinking. In case of other types of government it is not at all possible. Specially Autocracy is a kind of dictatorship where the people have no power of saying anything against the ruler.
Oligarchy is another form of
government where a small group of elite people rule over the common people.