Answer:
A island is an area of land where water surrounds it.
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Both China and North Korea still have Communist rulings, therefore both of them are Communist nations.
The correct answer is B: They are both communist nations.
We can also eliminate the other choices.
A: Does not make sense, since North Korea is not even close to being the largest country in East Asia.
C: Both China and North Korea do not have Democratic Constitutions, since they are both Communist Nations.
D: No one from North Korea won the Nobel Peace Prize. I'm not sure about China.
Therefore, the correct answer has to be B.
Hope this answer helped! Have a great day!