Answer:
A. Dressed in Persian clothing.
Explanation:
Alexander the Great was the son of King Philip II. He is best known to have been conquered four quarters of the world. He had expanded his empire to such a vast extent that the ancient world had ever seen.
When Alexander conquered other states, he did not desire to destroy local customs instead, he accepted their customs so that he would be accepted as a ruler.
One of the customs accepted by Alexander was the dress of Persian. As a ruler, he adopted decorative Persian clothes and received official visitors as per the Persian customs.
Therefore, option A is correct.