Examine the following command: SQL> ALTER TABLE booking SHRINK SPACE COMPACT; Which activity is performed when the preceding command is executed?（）

• A、The shrink operation touches every block in the BOOKING table
• B、The high-water mark (HWM) for the BOOKING table is shifted from its original position
• C、The progress of the shrink operation is saved in the bitmap blocks of the BOOKING table
• D、The data manipulation language (DML) triggers on the BOOKING table are executed because the shrink operation is internally handled by the INSERT/DELETE operation