Question

what is the best definition of propaganda?
political messages that refute previously assumed facts
biased or misleading information used to promote a cause or idea
exaggerated information used to call attention to negative traits
emotional messages that are shared privately through false ideas

Explanation:

Propaganda is defined as information that is not objective and is used primarily to influence an audience and further an agenda, often by presenting facts selectively (or lying outright) to encourage a particular synthesis or perception, or using loaded language to produce an emotional rather than a rational response to the information that is being presented. It is biased or misleading information used to promote a cause or idea.

Answer:

biased or misleading information used to promote a cause or idea