This depends entirely on the research project in question. For instance, if you want to learn more about how the memorial was constructed, you could look at the history of its architecture, etc. Or if you want to know more about how it was conceived you should look at the debates surrounding it's creation.
Answer:
Two LDC's-
Democratic Republic of the Congo- Presidential system
Afghanistan- Islamic republic
Two MDC's-
Japan- Monarchy
France- President and Prime Minister
Sorry I don't have anything for HDC's
Explanation:
The speaker of the house is voted on by members of the congress
hope this helps
The answer to the question is C