what is causing the issue?

— Exhibit —
user@switch-1> show spanning-tree bridge
STP bridge parameters
Context ID : 0
Enabled protocol : MSTP
STP bridge parameters for CIST
…

STP bridge parameters for MSTI 1
MSTI regional root : 4097.b0:c6:9a:73:27:90
Hello time : 2 seconds
Maximum age : 20 seconds
Forward delay : 15 seconds
Number of topology changes : 4
Time since last topology change : 42 seconds
Topology change initiator : ge-0/0/10.0
Topology change last recvd. from : 00:19:e2:55:24:8c
Local parameters
Bridge ID : 4097.b0:c6:9a:73:27:90
Extended system ID : 0
Internal instance ID : 1
STP bridge parameters for MSTI 2
MSTI regional root : 8194.b0:c6:9a:73:27:90
Hello time : 2 seconds
Maximum age : 20 seconds
Forward delay : 15 seconds
Number of topology changes : 4
Time since last topology change : 42 seconds
Topology change initiator : ge-0/0/10.0
Topology change last recvd. from : 00:19:e2:55:24:8c
Local parameters
Bridge ID : 8194.b0:c6:9a:73:27:90
Extended system ID : 0

Internal instance ID : 2
user@switch-1> show spanning-tree mstp configuration
MSTP information
Context identifier : 0
Region name : my-mstp-config
Revision : 1
Configuration digest : 0x91ee8012e6851d931adae71da4060690
MSTI Member VLANs
0 0,400-4094
1 1-199
2 200-399
user@switch-2> show spanning-tree bridge
STP bridge parameters
Context ID : 0
Enabled protocol : MSTP
STP bridge parameters for CIST
…
STP bridge parameters for MSTI 1
MSTI regional root : 8193.b0:c6:9a:73:39:90
Hello time : 2 seconds
Maximum age : 20 seconds

Forward delay : 15 seconds
Number of topology changes : 3
Time since last topology change : 320 seconds
Topology change initiator : ge-0/0/9.0
Topology change last recvd. from : b0:c6:9a:73:27:81
Local parameters
Bridge ID : 8193.b0:c6:9a:73:39:90
Extended system ID : 0
Internal instance ID : 1
STP bridge parameters for MSTI 2
MSTI regional root : 4098.b0:c6:9a:73:39:90
Hello time : 2 seconds
Maximum age : 20 seconds
Forward delay : 15 seconds
Number of topology changes : 3
Time since last topology change : 320 seconds
Topology change initiator : ge-0/0/9.0
Topology change last recvd. from : 00:19:e2:55:24:8d
Local parameters
Bridge ID : 4098.b0:c6:9a:73:39:90
Extended system ID : 0
Internal instance ID : 2
user@switch-2> show spanning-tree mstp configuration
MSTP information
Context identifier : 0

Region name : my-mstp-config
Revision : 10
Configuration digest : 0x91ee8012e6851d931adae71da4060690
MSTI Member VLANs
0 0,400-4094
1 1-199
2 200-399
— Exhibit —
Click the Exhibit button.
A colleague recently implemented MSTP in your Layer 2 network and is having trouble
determining why it is not working properly. You are asked to review the outputs provided in the
exhibit to determine the cause.
Referring to the exhibit, what is causing the issue?

A.
The region name is configured the same on both devices.

B.
The VLAN mapping is configured incorrectly.

C.
The MSTP revision is configured incorrectly.

D.
The bridge priority has not been configured correctly.