How should the administrator configure the physical switch-to-switch interfaces to accomplish these goals?

Refer to the exhibit.

The switches in the exhibit are all HP Comware switches that run Multiple Spanning Tree Protocol (MSTP).

The network administrator wants to ensure that each switch-to-switch link is in its own subnet. The administrator also wants to make sure that all of the links are available for routing during normal operation.

How should the administrator configure the physical switch-to-switch interfaces to accomplish these goals?
A . Configure them as trunk ports that permit VLANs 10 and 20.
B . Configure them as any type of port, and make sure spanning tree is enabled on them.
C . Configure them as route-mode ports.
D . Configure them as hybrid ports that carry VLAN 10 and 20 as untagged.

Answer: A