Refer to the graphic and routing table for router R1. Based on the output of the R1# show ip route command and the information presented in the graphic, which of the following is a potential routing problem?
R1#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateways of last resort is 0.0.0.0 to network 0.0.0.0
200.1.1.0/24 is variably subnetted,5 subnets, 3 masks
C 200.1.1.192/26 is directly connetcted, Loopback0
C 200.1.1.128/30 is directly connetcted, Serial0
D 200.1.1.64/26 [90/2195456] via 200.1.1.130, 00:02:15,Serial0
D 200.1.1.0/24 is a summary,00:00:41, Null0
C 200.1.1.0/26 is directly connected,Ethernet0
200.1.2.0/30 is subnetted, 1 subnets
C 200.1.2.4 is directly connetcted,Serial1
S* 0.0.0.0/0 is directly connetcted, Serial1
R1#
A.
the use of summarization for discontiguous networks
B.
the use of CIDR with a routing protocol that does not support it
C.
the use of VLSM with a routing protocol that does not support it
D.
the use of the no auto-summary command with a protocol that does not support summarization
E.
the use of the ip route 0.0.0.0 0.0.0.0 command with a routing protocol that does not support it