If it is written down, it's called "libel" whereas if it's spoken, it's called "slander." Defamation law attempts to balance the freedom of speech and open exchange of ideas without giving someone permission to run around spreading lies about another that may harm his or her reputation, ability to earn a living, etc.
Several of these figures were anti-capitalist, as well as anti-religion. They were also revolutionaries, not advocates of a rigid social system so the correct answer is (4) achieving change through revolution.
