Plants Are Important to the Development of Karst Primarily Because

Plants are important to the development of karst primarily because

A) they supply organic acids that enhance the dissolution process.
B) openings adjacent to their roots serve as microchannels that allow water to enter the rock.
C) the decay of large roots below the surface produces cavities which eventually enlarge to form caves.
D) None of the above plants play no role in the development of karst.