Which TWO are valid regarding Oracle Cloud Infrastructure (OCI) Virtual Cloud Network (VCN) peering?

A. Peered VCNs can have overlapping classless inter-domain routing (CIDR).

B. Peered VCNs can exist in different OCI regions.

C. Peered VCNs can exist in the same OCI region.

D. A VCN peering connection is a VPN based connection.

E. Peered VCNs need to be part of the same OCI tenancy.