What Was One of the Ways That Alexander the Great

What was one of the ways that Alexander the Great introduced institutional stability to Afro-Eurasian trading systems?

A) Alexander created a large empire with uniform laws and institutions that lasted for hundreds of years.
B) Governments under Alexander's control did not plunder cities but instead actively promoted trade.
C) Alexander required all merchants and caravans to agree to a trade contract forbidding unlawful competition.
D) Alexander's army defeated the major central Asian nomadic groups such as the Xiongnu, creating a new stability along the trade routes.