Answer:
B. taking action in support of a cause
here is the dictionary definition for advocacy
<em>"public support for or recommendation of a particular cause or policy"</em>
Answer:
The Japanese victory over Russian forces had shown the peoples of the Orient that Colonial Imperialists could be defeated and the Asian peoples could persevere in a war against the Occident.
These are the circumstances under which the protest of the students in Tinker v. Des Moines would be deemed unprotected speech:
if their action had clearly threatened order and safety.
And since it didn't, there was no reason for it to be deemed unprotected speech.