<span>The correct answer should be The Byzantine Empire flourished. The Byzantine empire adopted Christianity while it was still Roman empire and the religions didn't merge but rather went their own ways, splitting into Orthodoxy and Catholicism, former in the east latter in the west. The Byzantine empire flourished and became one of the strongest powers in the world.</span>
It would be the "Wagner Act" that allowed labor unions to participate in collective bargaining with business managers, since this was signed by FDR and was thought to be more fair to the individual workers.
It produced effective, well-trained government workers who helped the emperors rule China's growing, increasingly complex society and ran the day-to-day business of the government.