Answer:
Option B
Explanation:
According to the given question, we are asked to state the rock layer that must be porous and have enough permeability for fluid to move through the layer.
As a result of this, we can see that we are assuming that fracking has not been used with the oil and gas well and this rock layer would need to be permeable so that fluids can move through it to other areas.
Therefore, the correct answer is option B
