I believe the answer is: C. diplomats and ambassadors
Diplomats and ambassadors are deployed to live in foreign country as their country's representation in that foreign land. They played a huge role in negotiating political and trading agreements with foreign countries and also had the role in protecting the rights of citizens that live in foreign countries.
June 19, 1775 was when he was selected.
Lots of Chinese workers came to the USA to build railroads and mine natural resources.....