Refer to the exhibit. Routers R1 and R2 have established a neighbor relationship and are exchanging routing information. The network design requires that R1 r eceive routing updates from R2, but not advertise any routes to R2. Which configuration command sequence will successfully accomplish this task? （）

• A、R1(config)# router eigrp 1   R1(config - router)# passive - interface serial 0
• B、R1(config)# access - list 2 0 deny any   R1(config)# router eigrp 1   R1(config - router)# distribute - list 20 out serial 0
• C、R2(config)# access - list 20 permit any   R2(config)# router eigrp 1   R2(config - router)# distribute - list 20 in serial 0
• D、R1(config)# access - list 20 permit any   R 1(config)# router eigrp 1   R1(config - router)# distribute - list 20 in serial 0
• E、R2(config)# access - list 20 deny any   R2(config)# router eigrp 1   R2(config - router)# distribute - list 20 out serial 0
• F、R2(config)# router eigrp 1   R2(config - router)# passive - interface serial 0