what process will EIGRP use in the selection of a new successor?

After DUAL calculations, a router has identified a successor route, but no routes have
qualified as a feasible successor. In the event that the current successor goes down, what
process will EIGRP use in the selection of a new successor?

A.
EIGRP will automatically use the route with the lowest advertised distance (AD).

B.
The route will transition to the active state.

C.
The route will transition to the passive state.

D.
EIGRP will find the interface with the lowest MAC address.

E.
EIGRP will automatically use the route with the lowest feasible distance (FD).