Which three items are the main elements of Oracle Datab…

Which three items are the main elements of Oracle Database Resource Manager? (Choose three.)

A.
SQL Explain Plan

B.
resource plan

C.
resource consumer group

D.
resource plan directive

E.
IORMPLAN object

Explanation:
https://docs.oracle.com/cd/B28359_01/server.111/b28310/dbrm001.htm#ADMIN11844