You have an Azure DNS zone named adatum.com. You need to delegate a subdomain named research.adatum.com to a different DNS server in Azure. What should you do?
- A.Create an PTR record named research in the adatum.com zone.
- B.Create an NS record named research in the adatum.com zone.
- C.Modify the SOA record of adatum.com.
- D.Create an A record named ".research in the adatum.com zone.