It is A because it says that blacks were writing for not only African Americans, but to everyone!
More grain was produced elsewhere as well as the fact that increasingly more grain was produced around the same demand of grain.
The U.S constitution was fully signed on July 4th, 1776, the day America lawfully became a country.
The answer is trade barrier.
thx
It was "D. The Code of Hammurabi" that recorded a set of laws for a society, since it was thought that if common laws were made known and placed in public, then more people would follow them.
