Answer:
C. States must comply with the Constitution's free speech guarantee.
Explanation:
The case of Gitlow v. the People of New York is a decision of the United States government's Supreme Court that ruled that the freedom of speech and the freedom of the press upheld by the First Amendment should also be uphold by the state governments.
This case first began when journalist Benjamin Gitlow decided to publish a "Left Wing Manifesto" in 1919. This was opposed and sought in court by the state government, accusing him and his associate Alan Larkin of political anarchy. Although Gitlow assured that there is no actual violent suggestions in the paper, due to the nature of the advocation of the violent overthrow of the government, the Supreme Court decided to convict him. This brought the now famous case of state legislation regarding freedom of speech and freedom of the press as the same with that of the federal level.