Answer:
Option: B. the shift of the Roman Empire’s capital from Rome to Constantinople
Step-by-step explanation:
The transfer of power from the West to the East happened when Roman emperor Constantine I decided to transfer the capital of the Roman Empire to ancient Greek colony Byzantium. Byzantine Empire began to form as a new capital after Rome. Emperor Constantine chose the Greek colony for his Nova Rome because of its geographical condition. The region provided an excellent harbor and was surrounded by water by three-sided which offered a natural defense from invaders.