Refer to the exhibit. R1 has an OSPF path to R2 and R3 for 10.1.0.0/24, but R1 has a routing entry for 10.1.0.0/24 from only one router at a time. Which option is the most likely cause?
A. The R1 maximum-path is set to 1.
B. R2 has a higher administrative distance.
C. R2 is using a filter list.
D. R2 is using an offset-list.
