You have an Azure subscription that contains the resources shown in the following table. LB1 is configured as shown in the following table. You plan to create n...

You have an Azure subscription that contains the resources shown in the following table.

LB1 is configured as shown in the following table.

You plan to create new inbound NAT rules that meet the following requirements:
- Provide Remote Desktop access to VM1 from the internet by using port 3389.
- Provide Remote Desktop access to VM2 from the internet by using port 3389.
What should you create on LB1 before you can create the new inbound NAT rules?

A. a frontend IP address B. a load balancing rule C. a health probe D. a backend pool