Refer to the exhibit.
What is causing the error to occur on the MST switch?
A.
When a PVST+ switch is connected to an MST switch, the IST root (MST0) needs to be the
root for all PVST+ spanning trees.
B.
When a PVST+ switch is connected to an MST switch, interaction between MST and PVST+ is
not supported
C.
When a PVST+ switch is connected to an MST switch, root guard should be disabled on a perport basis.
D.
When a PVST+ switch is connected to an MST switch, the PVST+ switch must be the root for
all MST instances.