[单选题] 提问人:匿名网友 提问时间:2021-08-23

The earthquake occurs because_____.


A .the shifting of rocks along cracks in the earth’s crust
B .the radon levels of the water subside and drop back to normal readings
C .of the movements of the rocks
D .of the deforestation

提问人:匿名网友 提问时间:2021-08-23

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