How should the listener be configured so it retrieves new rows at most one time?

An On Table Row Database listener retrieves data from a table that contains record_id, an increasing numerical column.

How should the listener be configured so it retrieves new rows at most one time?
A . Set the target to store the last retrieved record_id value
B . Set the ObjectStore to store the last retrieved record_id value
C . Set the target to the record_id column
D . Set the watermark column to the record id column

Answer: D