I believe it is A, That seems like the most reasonable
The trade routes of the classical era most resemble the Internet because they both "A. facilitate communication and cultural exchange over great <span>distances," through a process of "cultural diffusion". </span>
The major way in which border areas of the west were affected by the mixture of people is that a plethora of immigrants from all over the world wanted to expand to the west in order to settle--meaning that people from all backgrounds often fought over land and job opportunities.
