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 A record named *.research in the adatum.com zone.
B. Create a PTR record named research in the adatum.com zone.
C. Modify the SOA record of adatum.com.
D. Create an NS record named research in the adatum.com zone.