A. Process includes identify candidates, create invisible auto indexes , verify with implement if performance improved and delete unused.

B. You can use the dbms_auto_index package to report on the automatic task and to set your preferences.

C. It is enabled by default.

D. You can control behavior at the statement level using the use_aoto_indexes or NO_USE_AUTO_INDEXES hints.

E. The indexing feature is implemented as an automatic task that runs at a fixed interval.