The correct option to associate a UCS B-Series server with a specific service profile when it becomes available is B. server. In Cisco UCS Manager, associating a service profile with a server can be done directly by selecting the server from the list of available hardware. This direct association ensures that when the server becomes available, it will be associated with the specified service profile, which contains the settings and policies for the server's operation within the UCS environment. References: Implementing and Operating Cisco Data Center Core Technologies (DCCOR) course