A. After you provision a VM DB system with a shape that supports Oracle RAC, you can change that shape to another shape that does not support Oracle RAC.

B. After you provision a VM DB system, you cannot change the shape. You have to provision another VM DB system using a full backup.

C. If the current shape of the VM DB system supports Oracle Real Application Clusters (RAC), then you can only change that shape to another shape that also supports Oracle RAC.

D. The shape of a VM DB system can be changed at any time, with no impact on the amount of storage available to the DB system.

E. It is possible to change the shape of a VM DB system with a higher number of OCPUs. However, reducing the number of OCPUs is not permitted.