Answer:
a. Dictators
b. Totalitarianism
c. Theocracy
d. Monarchy
e. Oligarchy
A dictator is a person exercising absolute power, especially a ruler who has absolute, unrestricted control in a government without hereditary succession. In ancient Rome, a person invested with supreme authority during a crisis, the regular magistracy being subordinated to him until the crisis was met.
Totalitarianism is a type of authoritarian regime in which power is concentrated in the hands of a person or a very small group of people.
Theocracy is a form of government in which God or a deity is recognized as the supreme civil ruler, the God's or deity's laws being interpreted by the ecclesiastical authorities.
A monarchy is a state or nation in which the supreme power is actually or nominally lodged in a monarch. In other words, it is a supreme power or sovereignty held by a single person.
Oligarchy is a form of government in which all power is vested in a few persons or dominant class or clique; government by the few.