The sizes of the circles on the image are proportional to:
(A) the depth of the epicentres of earthquakes
(B) the energy released at the focuses of earthquakes
(C) the potential for damage produced by earthquakes
(D) the speed of magma flowing through volcanoes5e0b078b30993.jpg

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統計： A(0), B(8), C(3), D(0), E(0) #2135960