Answer:
D
Step-by-step explanation:
A is not true because the majority of the European population isn't just in Eastern Europe, its the most highly populated area of Europe but it doesn't contain the majority of the population.
B is not true because western Europe is more populated than northern Europe as seen by the colors on the map
C is not true because Northern Europe is small and not densely populated so the majority of the population isn't there
This one is tricky as a and d are both good answers, but d is more correct since its easier and more obvious to see that far northern Europe has a far lower population than the entirety of southern Europe with countries like turkey and Italy which are a very deep orange, and still with the sheer number of small green countries in southern Europe, those add up, beating northern Europe by a mile.