What must you do before executing it?

Examine the details of the uncompressed, non-partitioned heap table CITIES.
Name Null? Type
CITYID NOT NULL NUMBER(4)
CITY_NAME VARACHAR2(50)

Examine the command:
SQL> ALTER TABLE cities SHRINK SPACE COMPACT;

What must you do before executing it? (Choose the best answer)

Examine the details of the uncompressed, non-partitioned heap table CITIES.
Name Null? Type
CITYID NOT NULL NUMBER(4)
CITY_NAME VARACHAR2(50)

Examine the command:
SQL> ALTER TABLE cities SHRINK SPACE COMPACT;

What must you do before executing it? (Choose the best answer)

A.
Ensure free space that is approximately equal to the space used by the table should be available.

B.
Ensure there are no pending transactions on the table.

C.
Enable row movement is enabled.

D.
Disable all indexes on the table.