Answer:
D. Tinker v Des Moines
Step-by-step explanation:
In the Tinker v Des Moines case (1969), the Supreme Court determined that public schools could not prohibit students from wearing of armbands in the school as a form of symbolic protest that did not disrupt the peace and order in the institution, because it constituted a violation to the students' freedom of speech right guaranteed by the First Amendment to the U.S. Constitution. This case served as a precedent for other subsequent cases, including Texas v. Johnson (1989), which determined that burning a flag was also a form of free expression protected under the First Amendment and that just because certain ideas or forms of expressions were deemed offensive or disagreeable by society, did not mean that they had to be prohibited.