Refer to the exhibits. An engineer is troubleshooting connectivity issues on the guest network.
Which cause of the issue is true?
A. The spanning-tree portfast trunk command must be removed.
B. The switchport mode must be configured as access.
C. The interface group has incorrect mappings.
D. The trunk port does not have the correct VLANs allowed.
It seems that the interface group has incorrect mappings.
vlan-997 -> 977 – should be 997
vlan-900 -> 900 – should be 990 according to addressing: 10.10.90, 10.10.91, 10.10.92.