Which two are functions of Oracle Workflow Directory Service? （）(Choose two.)

A. It is a server-side PL/SQL procedure.
B. When executing a PL/SQL function activity, it will automatically ping (cache) the PL/SQL code.
C. It executes deferred activities in decreasing order of their Cost property value (activities with higher cost value are processed first).
D. It would fail if another background engine process is started to handle the same type of activities within the same item type.
E. During its single invocation, it processes activities that were stuck, deferred or timed out when the background engine was started.

A. The Work Item is not eligible for Purge.
B. The Work Item is eligible for a Permanent purge.
C. The Work Item is eligible for a Temporary purge.
D. The Work Item is not complete because it still has "Open" Notification.
E. The Work Item is eligible for both Temporary and Permanent purge.