Which One of the Following Statements Concerning Soil Erosion Is

Which one of the following statements concerning soil erosion is NOT true?

A) Grasses and other vegetation, windbreaks, and contour cropping will help reduce losses of soil from cultivated lands.
B) Sheet erosion, rills, and gullies develop mainly during prolonged droughts.
C) Soils form naturally by weathering; if protected from erosion, sound management can maintain or enhance their nutrient levels and textural characteristics.
D) Rates of soil erosion exceed rates of soil formation in some parts of the world.