正解:C
To configure a multicast UDP jitter operation on a Cisco device, you would typically use the ip sla command to start an IP Service Level Agreements (SLAs) process. Then, you would define the operation type, which in this case is UDP jitter, meant for measuring the delay variation (jitter) in transmitting UDP packets between two routers. The configuration involves specifying the source IP, destination IP, destination port, and other relevant parameters.