What would the metric be for a summary route that summarizes all three OSPFv3 routes displayed?

The following exhibit shows ipv6 route output. What would the metric be for a summary route
that summarizes all three OSPFv3 routes displayed?

A.
160

B.
140

C.
120

D.
100

Explanation:
The cost of the summarized routes is the highest cost of the routes being summarized. In
fact, in the old RFC 1583 standard, the cost of the summary route was the cost of the lowest

metric. But when OSPF was updated in RFC 2178 and RFC 2328, the summary route
should have the same cost as the highest-cost summarized route. In this case, the highestcost is 100 according to the second entry.