What Tactic Did Leopold Use Most Successfully to Neutralize the Threat

What tactic did Leopold use most successfully to neutralize the threat of the Hungarian rebellion?

A) He granted them autonomy within the Holy Roman Empire.
B) He resettled the lands formerly occupied in war with other nationalities.
C) He deported all non-Catholics from his territory.
D) He decreed it illegal to use the Magyar language.
E) He promoted all Transylvanian nobility and replaced the Hungarian magnates.