By default, all VLANs will belong to which MST instance when using Multiple STP?

A.
MST00

B.
MST01

C.
The last MST instance configured

D.
None

Explanation:
Recall that the whole idea behind MST is the capability to map multiple VLANs to a smaller
number of STP instances. Inside a region, the actual MST instances (MSTIs) exist alongside the
IST. Cisco supports a maximum of 16 MSTIs in each region. IST always exists as MSTI number 0,
leaving MSTI 1 through 15 available for use. By default all VLANs are belonged to MST00
instance.