Answer:
People with type O- blood are called universal donors because their donated red blood cells have no A, B or Rh antigens and can therefore be safely given to people of any blood group. ... Their plasma does not contain A or B antibodies and can be transfused safely to all blood types.
Unity between the countries for each to work together.
C. Uncertainty.
You can see this with the "Lost generation" PEOPLE
Native Americans and Kentucky pioneers
