Answer:
D. He used secret police to eliminate any opposition.
Step-by-step explanation:
Totalitarianism is a political concept of a mode of government that prohibits opposition parties, restricts individual opposition and claims to the state, and uses an extremely high degree of control over public and private life.
It is the most extreme and complete form of authoritarianism. Political power is often held by one leader.
The other options are examples of authoritarian rule, but the use of police to eliminate opposition is a clear example of totalitarianism.
I hope this answer helps you.