Which Is Not a True Statement

Which is not a true statement?

A) Fracking is a process by which grains of sand are pumped down a drill casing and forced into the fractures of a rock which props them open
B) Fracking is a type of vertical drilling
C) Fracking may have 10-30 separate stages at a specific well
D) Fracking produces an artificial permeability network which provides pathways for oil or natural gas to seep into the well up to the surface