_ If your router is facilitating a CSU/DSU, which of the following commands do you need to use to provide the router with a 64000bps serial link?$?

• A. RouterA (config) #bandwidth 64
• B. RouterA (config-if) #bandwidth 64000
• C. RouterA (config-if) #clock rate 64
• D. RouterA (config-if) #clock rate 64000