The alternative which would best be classified as propaganda is the following one:
A. A nation's leader rewrites the national anthem, dedicating it to himself.
Explanation:
Propaganda has to do with the propagation of a doctrine and its political and social beliefs. Therefore, rewriting the national anthem, which is usually sung by every citizen of a country, is the best way to go when it comes to the dissemination of a doctrine, as well as the extolling of its leader.
