Europe and Japan are said to be " dying from within " because of not enough population -- babies are not being born quickly enough to replace the current population and support the older folks . America has only escaped this dire fate do to immigration . ( Europe had immigration , too , but they are not integrating , so , apparently , it does n't " count .
According to the above context, choose the best option to answer the following question.
Question: Why is the populating declining in Japan ?
Options:
A. There is a bunch of natural disasters .
B. There is a negative birthrate .
C. There is a bunch of immigration out of Japan and into Europe .
D. There is a bunch of immigration out of it .


B