Final answer:
The location at 30°W, 75°N is in the Atlantic Ocean east of Greenland and not part of any country. The location at 120°E, 60°N is in Russia, specifically Siberia. None of the provided options (A, B, C, D) in the question correctly match the locations given by the coordinates.
Step-by-step explanation:
The coordinates 30°W, 75°N do not correspond to any country but rather to the Atlantic Ocean east of the tip of Greenland, so this location is in international waters. The closest land mass to the north is Greenland, which is part of the Kingdom of Denmark. However, Greenland's territory does not actually reach that far east. The coordinates 120°E, 60°N place us in Russia, specifically in Siberia. Neither China nor the other countries listed at these coordinates cover these specific latitudinal and longitudinal points.
Therefore, the correct answer to what countries are located at 30°W, 75°N and 120°E, 60°N would be 'none, Russia', which is not one of the provided options. Given the options you have, they are all incorrect. It is important to consult a map or use geographic software to pinpoint exact locations if you are unsure.