What is one way that Darius united Persian empire?

Question

A. He forced conquered people to adopt Persian customs and religion.
B. He personally oversaw every branch of the Persian government.
C. He standardized coinage and other aspects of the Persian economy.
D. He expanded his empire through peaceful means rather than conquest's

Answer 1

C. He standardized coinage and other aspects of the Persian economy.

This action helped facilitate trade and economic cohesion within the diverse regions of the Persian Empire, contributing to a sense of unity among its vast and varied populations.