<span>In a representative democracy the power of government officials is primarily checked by "C. another branch," since this is what is referred to as "checks and balances". </span>
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.
The European nations explored America once they got there. They went there because there was so much land and it was a brand new undiscovered continent.