You are shrinking the SCOTT.EMP table by executing the ALTER TABLE SCOTT.EMP SHRINK SPACE CASCADE statement. What is a prerequisite for shrinking the SCOTT.EMP table？（）

• A、 You must enable the block change tracking feature.
• B、 You must have enable the flashback feature.
• C、 You must use the OMF in your database.
• D、 You must define the tablespace of the SCOTT.EMP table for automatic segment space management.