Which Sequence of Events Is Required to Form a Limestone

Multiple Choice

Which sequence of events is required to form a limestone cave where you can walk around and observe cave formations, such as stalactites?

A) limestone is below the water table, then lowering of the water table, then water dripping from the ceiling
B) lowering of the water table, then water dripping from the ceiling, then limestone is below the water table
C) water dripping from the ceiling, then lowering of the water table, then limestone is below the water table
D) none of these