Which english biologist developed the theory of "natural selection"? a. sir edwin chadwickb. charles dickensc. charles darwin d. karl max

C. a unitary system

Explanation:

A country that is run on a Unitary system does not let their local districts form their own government. Every single decisions and legislations that made by the Central government must be followed by all citizens in that country.

Typically, Unitary system could only work in a country with small area and typically low population. It would be really inefficient in large countries like United States or India.  Example of successful countries that use Unitary System are: France, Finland, and Singapore.