Cisco Express Forwarding has been enabled on router TK1. 
With CEF， prefixes that require exception processing can be cached with one of which four special adjacencies？ （）

A.The FIB lookup is based on the Layer 3 destination address prefix （shortest match）.
B.The adjacent table is derived from the ARP table.
C.The FIB table is derived from the IP routing table.
D.When the adjacency table is full， a CEF TCAM table entry points to the Layer 3 engine to redirect the adjacency.
E.CEF IP destination prefixes are stored in the TCAM table， from the least specific to the most specific entry.
F.When the CEF TCAM table is full， packets are dropped.

A.Ports Fa2/1 and Fa2/2 source DHCP requests only. Port Fa3/1 is eligible to source all DHCP messages and respond to DHCP requests.
B.Ports Fa2/1 and Fa2/2 respond to DHCP requests only. Port Fa3/1 is eligible to source all DHCP messages.
C.Ports Fa2/1 and Fa2/2 are eligible to source all DHCP messages and respond to DHCP requests. Port Fa3/1 can source DHCP request only.
D.All three ports， Fa2/1， Fa2/2， and Fa3/1， are eligible to source all DHCP messages and respond to DHCP requests.

A.  2（config-if）#ip address 10.10.10.2 255.255.255.0   2（config-if）#standby 1 priority 200   2（config-if）#standby 1 ip 10.10.10.10
B.  2（config-if）# ip address 10.10.10.2 255.255.255.0   2（config-if）#standby 1 priority 195   2（config-if）#standby 1 preempt   2（config-if）#standby 1 ip 10.10.10.10
C.  2（config-if）# ip address 10.10.10.2 255.255.255.0   2（config-if）#standby 1 priority 190   2（config-if）#standby 1 ip 10.10.10.10   2（config-if）#standby 1 track interface fa 1/1
D.  2（config-if）# ip address 10.10.10.2 255.255.255.0   2（config-if）#standby 1 priority 200   2（config-if）#standby 1 preempt   2（config-if）#standby 1 ip 10.10.10.10   2（config-if）#standby 1 track interface fa 1/1