Barack configures a Window $2019$ server as a DNS server. He creates forward and reverse lookup zones on the server to provide authoritative responses. A client contacts the DNS server for a lookup request, but the request cannot be resolved using the zones.

Which of the following is true of this scenario?

a$.$ The DNS server will attempt to resolve the request by performing a recursive query using the root hints.

b$.$ Barack needs to set up the DNS server as a default forwarder to resolve the lookup request using root hints.

c$.$ Barack needs to set up cached entries and root hints on the server after deleting the zones.

d$.$ The DNS server will automatically forward the request to another DNS server that is capable of resolving the lookup request.