Answer:
The students were punished for a nonviolent expression of their views.
Step-by-step explanation:
This is a summary of the case Tinker vs. Des Moines (1969). In this case, a public school in Iowa suspended a group of students who were wearing black armbands to school. The students wanted to protest the Vietnam War, but the school argued this was against school policy. The case reached the Supreme Court in 1969. The Court argued that the students had a right to free speech and peaceful protest. Therefore, their actions were protected by the First Amendment.