Answer:
A. protected by the first amendment
Step-by-step explanation:
At that time, Tinker coordinated a protest toward government's policy to sent troops to vietnam war by making the members of protest wear armbands that symbolize their disapproval.
Des Moines Independent Community School District brought the case to the court because they believe the activists' action was disrupting the school hour. They argued that first amendment only protected people's vocal speech.
The court disagree and ruled in favour of Tinker. They determined that non-vocal / symbolic speech could also be used in protest that protected under the first amendment.