Refer to the exhibit. Users in the Operations VLAN on Switch A are unable to communicate with users in the Operations VLAN on Switch B. Which action resolves the issue?

Setting the switchport mode to dynamic desirable on Switch B influences how a port attempts to form a trunk, but it does not control which specific VLANs are permitted to cross an established trunk link.

Setting the EtherChannel mode to LACP on Switch A configures the negotiation protocol for bundling multiple physical links into a logical EtherChannel, which is unrelated to allowing specific VLANs across a trunk.

For traffic belonging to a specific VLAN (like the Operations VLAN) to traverse a trunk link between two switches, that VLAN must be included in the allowed VLAN list on the trunk port configuration of both Switch A and Switch B.

Setting the EtherChannel mode to PAGP on Switch B similarly configures the negotiation protocol for EtherChannel and does not address the issue of VLAN allowance on the trunk.