Final answer:
Alexander the Great conquered the Persian Empire, assimilated cultures, and treated the conquered with respect in order to solidify his control and claim the title of the Great King. so, option C is the correct answeer.
Step-by-step explanation:
The action that Alexander the Great took regarding Persia was that he conquered the Persian Empire. Although he at first burned Persepolis and sought vengeance, after the assassination of Darius III, he shifted his approach and aimed to assimilate and unify the Greek and Persian cultures. Alexander maintained the Persian bureaucracy and married Greek and Macedonian officers to Persian noblewomen, enrolled thousands of Persian soldiers into his army, and treated the conquered people with respect, which is akin to the strategies used by previous Persian rulers like Cyrus the Great and Darius I. This strategy enabled Alexander to claim the title of the Great King and solidify his hold on the vast empire.
Alexander took the action of conquering Persia. After sacking and burning Persepolis, the capital of the Persian Empire, Alexander claimed the Persian throne and introduced Persian customs to his court. He also maintained the Persian bureaucracy and enlisted Persian soldiers to join his campaign. Alexander's goal was to become the next Great King and consolidate his control over the Persian Empire.