In a centrally switched deployment, the WLAN traffic is tunneled via CAPWAP from the AP to the WLC, where VLAN assignment occurs. To ensure that client devices are placed into the correct VLAN (in this case, VLAN 10), the WLAN policy profile must define the VLAN mapping. This allows the WLC to tag client traffic appropriately when forwarding to the upstream switch. Option C is correct because it configures the WLAN profile (policy profile) with VLAN 10, ensuring all clients associating with the WLAN are mapped to the proper VLAN automatically. Option A is incorrect because VLAN tagging is managed centrally on the WLC, and access ports at the AP are typically trunked or transparent in central switching mode. Option B is invalid; manually configuring VLAN on client devices is not feasible or scalable in enterprise deployments and does not integrate with CAPWAP central switching. Option D is also incorrect; relying on MAC-based redirection introduces complexity and is not standard practice for VLAN assignment in centrally switched networks. Cisco Wireless Core Technologies recommend using policy profiles to centrally enforce VLANs, simplifying management, ensuring security compliance, and supporting consistent enterprise Wi-Fi connectivity. Reference topics: Client Connectivity Configuration --- VLAN assignment, WLAN policy profiles, centrally switched deployments, Cisco Catalyst 9800 WLC.