Which must you do to enable the creation of the bitmap index?

While designing a database, you created the EMPLOYEES table as an index-organized table
(IOT).
You must create a bitmap index on the EMPLOYEES .JOB_ID column.
Which must you do to enable the creation of the bitmap index?

A.
A primary key must have been created.

B.
A mapping table must have been created.

C.
An overflow tablespace must have been specified.

D.
The PCTTHRESHOLD option must have been specified.