Which three are true about upgrading an application in an application container?

A、Theupgradecanbeperformedwhenconnectedeithertocdb$SrootortoPDB$SEED
B、Anapplicationnameandversionnumbermustbespecifiedtoupgradetheapplication
C、Afteranapplicationupgrade,theapplicationcontainerspdbsremainsynchronizedwiththeexistingapplicationroot
D、TheupgrademustbeperformedwhenconnectedtoCDB$ROOTE)Anapplicationrootclonegetscreatedautomatically
E、Anapplicationrootclonegetscreatedautomatically
F、Afteranapplicationupgrade,theapplicationcontainersPDBSareautomaticallysynchronizedwiththeapplicationrootclone