This is going to be A. An artefact is something that <em>we </em>made! =)
The right answer I think would be D
Taxation without representation. It is mostly commonly shown as the Boston Tea Party, where they were complaining about the tea tax.
The answer is Letter C. Iron curtain is the political separation of Western and Eastern Europe. It started from the end of World War II in 1945 until the last part of Cold War in 1991. Countries who are members of the Warsaw pact are located at the east side of the Iron Curtain while NATO members are on the west side.