Flying Tigers. The 1st American Volunteer Group (AVG) of the Chinese Air Force in 1941–1942, nicknamed the Flying Tigers, was composed of pilots from the United States Army Air Corps (USAAC), Navy (USN), and Marine Corps (USMC), recruited under presidential authority and commanded by Claire Lee Chennault.
Answer:
c separation of powers(sorry don't have explanation)
C) Japan
The Kuril Islands dispute, also known in Japan as the Northern Territories dispute, is a disagreement between Japan and Russia and also some individuals of the Ainu people over sovereignty of the four southernmost Kuril Islands.
1. The reader must have a basic background about the topic that is being discussed. If not, then the likely chances of them understand will be little to none.
2. Elaborate on who these 'new citizens' are, so far I know nothing about this topic.
3. Primary sources give the person a steady ground to understand said topic and have a better outcome of factual information.
4. They help make the argument because of factual evidence that can be used to counteract the biased/nonbiased POV of the reader(s).
it has a group of people (the population ).
source: internet