In Tinker v. Des Moines , why did the Supreme Court rule in favor of the students who wore armbands?

The Supreme Court ruled that students do not lose their First Amendment rights at school, provided their expression does not substantially disrupt school or infringe on others’ rights. The students’ armbands were a form of expression, and the school had not shown that they caused a disruption. So the best choice is “Their action was not disruptive.”

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