Click the Exhibit Button

Click the Exhibit button. You have configured MSTP in your Layer 2 network. You are having problems with it establishing correctly. Referring to the exhibit, what is causing the problem?

A) The region name is not correct.
B) You must assign a context ID number other than zero.
C) The MSTI-to-VLAN mapping does not match.
D) The revision number is the same on both devices.