What is a characteristic of a Schlatt or Flatt, a type of landform found in Lower Saxony?

A. It is a sandy dune field shaped by wind erosion
B. It is a type of rocky outcropping formed by tectonic activity
C. It is a shallow, undrained body of water usually fed by surface water
D. It is a deep, drained body of water primarily fed by groundwater
Answer: 