Which of the following routes may exist in the RTD’s routing table?

In the topology shown in the figure, perform the following configurations on RTA, RTB, RTC, and RTD respectively:

RTA-LoopBack0] ip address 1.1.1.1 255.255.255.255

RTA]ospf 1

RTA-ospf-1]area 1

RTA-ospf-1-area-0.0.0.1]network 10.0.0.0 0.0.0.255

RTA-ospf-1]import-route direct

RTB-LoopBack0] ip address 2.2.2.2 255.255.255.255

RTB]ospf 1

RTB-ospf-1]area 1

RTB-ospf-1-area-0.0.0.1]network 10.0.0.0 0.0.0.255

RTB-ospf-1-area-0.0.0.1]area 0

RTB-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0

RTB-ospf-1-area-0.0.0.0]network 20.0.0.0 0.0.0.255

RTC-LoopBack0] ip address 3.3.3.3 255.255.255.255

RTC]ospf 1

RTC-ospf-1]area 0

RTC-ospf-1-area-0.0.0.0]network 20.0.0.0 0.0.0.255

RTC-ospf-1-area-0.0.0.0]area 2

RTC-ospf-1-area-0.0.0.2]nssa

RTC-ospf-1-area-0.0.0.2]network 30.0.0.0 0.0.0.255

RTC-ospf-1-area-0.0.0.2]network 3.3.3.3 0.0.0.0

RTD-LoopBack0] ip address 4.4.4.4 255.255.255.255

RTD]ospf 1

RTD-ospf-1]area 2

RTD-ospf-1-area-0.0.0.2]network 30.0.0.0 0.0.0.255

RTD-ospf-1-area-0.0.0.2]nssa

RTD-ospf-1]import-route direct

Which of the following routes may exist in the RTD’s routing table? (Multiple choice)
A . 1.1.1.1/32
B. 2.2.2.2/32
C. 3.3.3.3/32
D. 0.0.0.0/0

Answer: BC

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