使岩石融化的热量来自哪里？单项选择题

A

软流圈，最初的热源所在

B

核心中的放射性衰变以及压力的影响

C

地狱

D

岩石圈是地球上最热的“层”，也是所有“层”中放射性元素浓度最高的层

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