From the context, it can be concluded that olivine must be ______.A.a kind of volcanic soi
From the context, it can be concluded that olivine must be ______.
A.a kind of volcanic soil containing lava and mineral rock
B.a kind of volcanic rock with its main content of lava and magnesium
C.a kind of rock mainly consisting of oxygen, iron and magnesium
D.a kind of oxygen with iron and magnesium