What Was One of the Key Reasons That Tens of Thousands

What was one of the key reasons that tens of thousands of people were forced from their homes and made to resettle close to the Assyrian Empire?

A) to create a large Assyrian capital city around the empire
B) to ensure a large number of laborers near the empire
C) to punish people for not having made tributes to the kings
D) to increase population density in certain areas of the empire