Answer:
"The U.S. system is built on the idea that the free and open exchange of ideas encourages understanding, advances truth-seeking and allows for the rebuttal of falsehoods."
Step-by-step explanation:
This statement from the article Freedom of Expression in the United States would be the best piece of text evidence to support Kianna's claim that everyone is protected under the First Amendment to peaceably voice their opinion at a protest. The statement suggests that the U.S. system values the ability of individuals to express their opinions and ideas freely and openly, which supports Kianna's claim that everyone has the right to protest and voice their opinion.