Answer:
The answer is D he wrote a letter describing the violence African Americans Faces
A country needs rules about citizens cause in reality you cant have random people, bad record or not, coming in your country and just being a citizen instantly without any proof of trust, little do they know they could be a terrorist with the rights of a citizen just cause theirs no way to justify who's one or not.
It paved the way for discovery, Colonization, And honestly it helped almost all of the world be discovered and identified along with the idea's of age old nations that the european's didn't even know about like rome and such to have a profound affect on there culture and way of life
