Which is the best explanation for why you may not always be able to observe rocks transforming from one type to another?
A Most all rock is transformed beneath the surface of the Earth.

B The transformation of rock happens slowly over a very long time period in the
geologic time scale.

C Most all rock is transformed by molten magma inside a volcano.

D The transformation of rock happens faster than we can observe.

The transformation of rock happens slowly over a very long period in the geologic time scale is the best explanation for why you may not always be able to observe rocks transforming from one type to another.

The transformation of rock is a slow process that happens with increasing pressure and heat.
The process of transformation of rock is called the rock cycle because rock changes into erosion, crystallization, etc.

Therefore we can conclude that seeing the transformation of rock is not possible because of the slow process with a different type of rock.

Thus option B is the correct answer.

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