Which statement is true about instance caging setup?

A.
The initialization parameter resource_manager_plan should be set.

B.
For a system with 16 threads, the sum of cpu_count for all databases should not be higher than 32 to
prevent oversubscribing.

C.
Database instances need to be restarted to make changes to cpu_count effective.

D.
The CPU Resource Manager and IORM need to be enabled to make instance caging to work as expected.

E.
Instance caging is the right approach to make sure that database instances are not stealin memory from
one another.

Explanation:
http://www.oracle.com/technetwork/database/performance/instance-caging-wp-166854.pdf