The network is displayed in the diagram below： You use the following information for switch SWA：  Port Mode Encapsulation Status Native VLAN fa0/1 desirable n-802.1q trunking 5 Port VLANs is allowed on trunk fa0/ 1 1-100， 102-1005  Port VLANs is owned and active in management domain fa0/1 1-6. 8-100， 102-115， 197-999， 1002-1005  Port VLANs in spanning tree forwarding state and not pruned fa0/1 1-6， 8-100， 102-105， 108-999， 1002-1005  SW users in VLAN 107 complain that they are unable to gain access to the resources through theSW1 router.  What is the cause of this problem？（）

• A、VLAN 107 is not configured on the trunk
• B、VLAN 107 does not exist on switch SWA
• C、VTP is pruning VLAN 107
• D、Spanning tree is not enabled on VLAN 107
• E、None of the other alternatives apply