How have the volcanic mountains throughout the islands of Japan historically affected the Japanese?
A.
Volcanic soil is very rich, so it played an important role in the development of Japanese agriculture.
B.
Because volcanoes are a constant threat, the main islands of Japan have low populations.
C.
Volcanic eruptions occurred primarily on one side of the main island, which remained unsettled.
D.
Early Japanese religion centered on offering sacrifices to the volcanoes for protection.