How does EIGRP derive the metric for manual summary routes?

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.