The answer is: The decision affirmed the protection of symbolic speech.
Tinker v. Des Moines revolved around an activism movements that conducted by students led by Mary Beth Tinker. She organized the students to wear black arm bands to school in protest of the vietnam war.
At that time, the school admins shut down the activism since they see that wearing an armband is not a 'speech' and cannot be protected under the first amendment.
They later on brought the case to the court. The court decided that wearing an armband is a form of symbolic speech that is included under the protection of the first amendment.
The first country to have adopted time zones was New Zealand, than still part of the British Empire, in the second half of the nineteenth century, or more specifically on November 2 in 1868. It was based on the longitude of 172° 30' East of Greenwich, which is 11 hours and 30 minutes ahead of the GMT.
Because the blacks needed a period of probation and instruction. A period is long enough for the black to have forgotten something of the condition as a slave.
I failed My final exam for not studying. I learned that studying is helpful.
The answer above is correct ^