(WORTH 30 POINTS!!!) Choose the answer that best describes the geologic process that contributes to the formation of fault-block mountains. A. The Earth's crust is pushed together which tilts layers of rock on their side producing steep scarps. B. The Earth's crust is pulled apart creating deep folds and then pushed together generating steep scarps. C. The Earth's crust stretched from swelling underneath and vertical movement by blocks generates steep scarps. D. The Earth's crust is pushed together which forces up blocks vertically creating steep scarps.