Answer:
The best answer for this question is "d. can never censor student speech"
Explanation:
The freedom of speech is internationally institutionalized as a human right under the article 19 of the Universal Declaration of Humans Rights and therefores if the government of a country voted in favor of the declaration of human rights they should guarantee freedom of speech in their territory, if a public school (have noted that public school are not private entities so they are reagulated by the government) censor in any way the speech of any student they are infringing this human right, so the best option is D, can never censor student speech.
Viewed by many as Lincoln’s greatest speech, this address declared that slavery was the war’s essential cause and that the war was an expiation of the national sin of slavery. Speaking transcendently to history, President Lincoln explained the Civil War—its cause, its character, and its immediate consequences. Though he wanted to be clear that slavery caused “this mighty scourge of war,” he ended on a hopeful note of binding up the nation’s wounds. His message of “charity for all” diverted some Republican desires for harsh retribution against the South.