Refer to the exhibit. Which configuration on R1 would advertise a summary route of the two LANs to R2? 
- area 0 range 2001:db8:10::/44
- area 0 range 2001:db8:11::/48
- area 0 range 2001:db8:20::/44
- area 0 range 2001:db8:21::/48
Explanation: The network prefix 2001:db8:20::/44 will summarize the 2001:db8:21:10::/64 and 2001:db8:22:10::/64 networks.
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