What command will prevent RIP updates from C being sent to router A from router B and C network diagram?

To prevent RIP updates from being sent from router B and C to router A, you can use the command passive-interface on router B for the interface connected to router A. This command will stop RIP updates from being sent out that specific interface while still allowing updates to be received. Additionally, ensure that RIP updates are not configured on the interface connecting B and C if you want to restrict routing updates further.