A. Redistribution must be enabled mutually (in both directions) to work correctly.
B. auto - summary causes the OSPF routes redistributed into EIGRP to be summarized; thus the OSPF network 116.16.34 is summarized to 116.3 4.0.0, which is already covered by the EIGRP protocol.
C. Default metrics are not configured under EIGRP.
D. Both routing protocols must have unique autonomous system numbers for redistribution to function correctly.

A.The last default - network statement will always be preferred.
B.A route to the 140.140.0.0 network does not exist in the routing table.
C.Default - network selection will always prefer the statement with the lowest  IP address.
D.A router will load balance across multiple default - networks; repeatedly issuing the show ip route command would show the gateway of last resort changing between the two networks.