To make new ways of transportation.
It moved military forces through a neutral country
In 721 BCE, the Assyrian army captured the Israelite capital at Samaria and carried away the citizens of the northern Kingdom of Israel into captivity. ... After the fall of the northern kingdom, the kings of Judah tried to extend their influence and protection to those inhabitants who had not been exiled.
Well, the first 2 were in the Gothic period which was after the one you are asking about. Also, Stone masonry has been around for longer than that period. I would say C.
