Correct Answer: A,D
Explanation
https://docs.cloud.oracle.com/iaas/Content/Network/Concepts/dns.htm
This is an Oracle-provided option that includes two parts:Internet Resolver: Lets instances resolve hostnames that are publicly published on theinternet. The instances do not need to have internet access by way of either an internet gateway or a connection to your on-premises network (such as an IPSec VPN connection through a DRG ).VCN Resolver: Lets instances resolve hostnames (which you can assign) of other instances in the same VCN. For more information, see About the DNS Domains and Hostnames.By default, new VCNs you create use the Internet and VCN Resolver. If you're using the Networking API, this choice refers to the VcnLocalPlusInternet enum in the DhcpDnsOption object.
The Internet and VCN Resolver does not let instances resolve the hostnames of hosts in your on-premises network connected to your VCN by IPSec VPN connection or FastConnect. Use your own custom DNS resolver to enable that.
https://docs.cloud.oracle.com/iaas/Content/Network/Concepts/dns.htm?Highlight=DNS%20resolver#About