I think it should be because diplomats is the representative of a nation and negotiating with other nations could be more easier if we're already friendly with the diplomat. Also the way we treat their diplomat is also the way of how we treat the nation he/she representing and it would add a good standing in the global status if we are respecting the diplomats.
A. economic prosperity is tied to strong and stable societies.
Establish that former slaves were to be treated legally as United States Citizens
Answer: people who were participating in different religions and people of color. :)
Explanation: