Answer:
Option B.
Explanation:
Darius, is the right answer.
Darius began regular tax adjustments which financed for some great projects. Such projects incorporated the capital center, Persepolis, shifting a famous city, the development of caravanserai, a common currency and the Royal Road. Persians under the rule of Darius designed a common currency, known as the Daric, to be accepted throughout the empire. The use of currency made trade easier whereby strengthening the empire and expanding prosperity.
