While designing your database， you have created the EMPLOYEEStable as an index-organized （IOT）. You want to create a bitmap index on the JOD_IDcolumn to make queries faster. Which task must have been completed so that you are able to create 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.