C. The water cycle spreads water out evenly around the whole Earth
Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering- resistant rocks, such as quartzite, given the right conditions.
I think the answer is ruthorford
5 times that of initial pressure i.e 1625 kpa