Citizenship because African Americans were fighting for citizenship which led to the civil war and after they got citizenship.
Crop rotation is wht they will use
A. A diary from a Jewish Prisoner because these trials were held against the Nazis' , so if you had a primary source of information, it would be the most logical.
I would say the agricultural aspect of how the Mayans grew their crops. I learned this unit just a few months ago and even a bit before. This article has a lot on the Mayan culture.
Source: www.history.com/topics/maya
C. it was the souths major transportation link