Answer: d. Babylon forced artists and intellectuals to move to the capital.​
Step-by-step explanation:
The ancient empire of Babylon in Mesopotamia is one of the most famous kingdoms of all time owing this not only to its mentions in the Bible, but to its status as a cultural and architectural centre of the ancient world.
They managed to achieve this by forcing artists and intellectuals whose countries had been conquered to move to the capital where they would contribute to its growth and status. This was also corroborated by the book of Daniel in the Bible.