How does EIGRP derive the metric for manual summary routes?
A.
It uses the best composite metric of any component route in the topology table.
B.
It uses the worst composite metric of any component route in the topology table.
C.
It uses the best metric vectors of all component routes in the topology table.
D.
It uses the worst metric vectors of all component routes in the topology table.
When EIGRP creates a summary route, it includes a metric with the route in order to advertise it.
EIGRP searches for components of the summary to be suppressed and represented by the summary. EIGRP finds the component with the best metric and copies the metric from it into the summary.
http://www.cisco.com/c/en/us/td/docs/ios/iproute_eigrp/command/reference/ire_book/ire_s1.html#wp1059092
So the manual summary routes has the equal best metric.
C is tricky, thinking not right in English??