While designing your&#8194

While designing your database， you have created the EMPLOYEES table as an index­organized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（）

• AA primary key must have been created.
• BA mapping table must have been created.
• CAn overflow tablespace must have been specified.
• DThe PCTTHRESHOLD option must have been specified.