A. Who was a citizen in Rome?

b. How could a slave become a citizen?

c. What were the obligations and privileges of Roman citizens?

I don't think a slave could become a citizen in Rome.

It depends on the year

answer; /// i do believe that its napolean's conquest of spain;

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".