Refer to the exhibit.
All of the switches in the exhibit are running Multiple Spanning Tree Protocol (MSTP). The ports that connect to
another switch are not boundary ports. All switches are configured as follows:• Config name = Region 1
• Revision number = 1
• Instance 1 =VLANs 10 and 12
• Instance 2 = VLANs 11 and 13
Currently, only VLANs 1, 10, 11, 12, and 13 exist on the four switches. A network administrator adds VLAN 15
to Switch_C. How is the topology affected by this change?

A.
No topology changes occur with spanning tree.

B.
The ports that connect to other switches on Switch_C become boundary ports.

C.
Switch_C enters a spanning-tree inconsistent state and blocks all ports.

D.
Link load sharing is no longer in effect on Switch_C.