The correct answer is E) Ku Klux Klan rally designed to start a riot against the minorities.
The Supreme Court would likely view all of these actions as violating the constitutional right to free speech EXCEPT "Ku Klux Klan rally designed to start a riot against the minorities."
The US Supreme Court cannot impede the free expression of personal beliefs. In this case, if the KKK is preparing a riot against minorities, they are planning and having their meetings. They are free to do so. If they violent attack a member of a minority group, then that is aggression and the individual or individuals could file a lawsuit.