You need to configure an Azure web app named contoso.azurewebsites.net to host www.contoso.com. What should you do first?

You need to configure an Azure web app named contoso.azurewebsites.net to host www.contoso.com.
What should you do first?

A. Create A records named www.contoso.com and asuid.contoso.com. B. Create a TXT record named asuid that contains the domain verification ID. C. Create a CNAME record named asuid that contains the domain verification ID. D. Create a TXT record named www.contoso.com that has a value of contoso.azurewebsites.net.