Which configuration resolves the issue?


Refer to the exhibit. The network administrator has configured the Customer Edge router (AS 64511) to send only summarized routes toward ISP-1 (AS 100) and ISP-2 (AS 200). router bgp 64511 network 172.16.20.0 mask 255.255.255.0 network 172.16.21.0 mask 255.255.255.0 network 172.16.22.0 mask 255.255.255.0 network 172.16.23.0 mask 255.255.255.0 aggregate-address 172.16.20.0 255.255.252.0 After this configuration. ISP-1 and ISP-2 continue to receive the specific routes and the summary route. Which configuration resolves the issue?
A. router bgp 64511 aggregate-address 172.16.20.0 255.255.252.0 summary-only
B. router bgp 64511 neighbor 192.168.100.1 summary-only neighbor 192.168.200.2 summary-only
C. interface E 0/0 ip bgp suppress-map BLOCK_SPECIFIC !i nterface E 0/1 ip bgp suppress-map BLOCK_SPECIFIC !i p prefix-list PL_BLOCK_SPECIFIC permit 172.16.20.0/22 ge 24 ! route-map BLOCK_SPECIFIC permit 10 match ip
address prefix-list PL_BLOCK_SPECIFIC
D. ip prefix-list PL_BLOCK_SPECIFIC deny 172.16.20.0/22 ge 22 ip prefix-list PL BLOCK SPECIFIC permit 172.16.20.0/22 ! route-map BLOCK_SPECIFIC permit 10 match ip address prefix-list PL_BLOCK_SPECIFIC ! router bgp 64511 aggregate-address 172.16.20.0 255 255.252.0 suppress-map BLOCKSPECIFIC

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