Refer to the exhibit. MPLS has been configured on all routers in the domain. In order for R2 and R3 to forward frames between them with label headers, what additional configuration will be required on devices that are attached to the LAN segment?（）

• A、Decrease the maximum MTU requirements on all router interfaces that are attached to the LAN segment.
• B、Increase the maximum MTU requirements on all router interfaces that are attached to the LAN segment.
• C、No additional configuration is required. Interface MTU size will be automatically adjusted to accommodate the larger size frames.
• D、No additional configuration is required. Frames with larger MTU size will be automatically fragmented and forwarded on all LAN segments.