Which two statements are true when using non-rolling release upgrades in a Data Guard environment?

The compatible parameter on a standby database that is applying redo, must be equal to or greater than the compatible parameter on the primary that is shipping redo to that standby (A):This ensures that the standby database can apply redo from the primary, even after the primary has been upgraded. TheCOMPATIBLEparameter setting on the standby database should not preclude it from understanding the redo it receives.

Modifications to the data dictionary on the primary database caused by the upgrade, are applied on a physical standby database (C):When the primary database undergoes a non-rolling upgrade, any resulting data dictionary changes are transmitted through redo data and applied to the physical standby database.