Correct Option: C

The state is a human institution. The population is, therefore, an essential element of the state. However, the population can constitute a state only when it is united by the conditions of interdependence, conscious-ness of common interest and general regard for a set of common rules of behaviour and institutions. In addition to the size of the population the quality of the population inhabiting the state is also equally important. Aristotle maintained that a good citizen makes a good state and a bad citizen makes a bad state.