B$.$ Under the Tinker ruling, what must a school demonstrate before it may limit a student's First Amendment rights?In Tinker v$.$ Des Moines School District, the Supreme Court examined a student's First Amendment rights on school property.

a$.$ What were the facts of that case?

b$.$ Under the Tinker ruling, what must a school demonstrate before it may limit a student's First Amendment rights?

c$.$ After Tinker, what other cases have been decided to further define proper regulation of student speech on $-$ and off $-$ of school property?