Propaganda is primarily used by governments to . A.
persuade its own people to have a certain opinion on an issue or behave in a certain way
B.
make sure all people understand their rights
C.
convince other countries to support its position on certain issues
D.
influence citizens to vote for a certain candidate during an election

A. persuade its own people to have a certain opinion on an issue or behave in a certain way

Explanation:

Propaganda is used by governments to persuade their people to believe in a certain thing.

For example, WWI propaganda was used in the US in a variety of different ways- one way was to influence the citizens to enlist in the army (ex: Uncle Sam)

to protest slavery i would think it would be a