A one-party system
O exists in nearly all dictatorships today.
O is what the United States has today.
O creates an unstable government.
O results in democracy.

Right choice:

It exists in nearly all dictatorships today.

Explanation:

Many dictatorships find justification in some ideology; this type of dictatorship tends to be a rule of one-party system. In other undemocratic regimes, there may be an apparent multi-party system, but in practice, the ruling party of the dictator has real power and other entities are just collaborators.

1 and 2

explanation:

answer; /// i believe that the correct answer is(cognitive revolution);