Which two are true for achieving High Availability on Oracle Cloud Infrastructure?

Which two are true for achieving High Availability on Oracle Cloud Infrastructure? (Choose two.)
A. Store your database across multiple regions so that half of the data resides in one region and the other half resides in another region.
B. Attach your block volume form Availability Domain 1 to a compute instance in Availability Domain 2 (and vice versa) so that they are highly available.
C. Configure your database to have Data Guard in another Availability Domain in Sync mode within a region.
D. Store your database files on Object Storage so that they are available in all Availability Domains in all regions.
E. Distribute your application servers across all Availability Domains within a region.

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