How would you characterize the source and type in a Denial of Service attack on a router ?

A.
By performing a ??show ip interface?? to see the type and source of the attack based upon the access-list matches

B.
By performing a ??show interface?? to see the transmitted load ???txload??? and receive load ???rxload ???, if the interface utilization is not maxed out, there is no attack underway

C.
By setting up and access-list to permit all ICMP, TCP, and UDP traffic with the log or lot ????��?Cinput commands, then use the show access-list and show log commands to determine the type and source of attack

D.
By applying and access-list to all incoming and outgoing interfaces, turning off route-cache on all interfaces, then, when telnetting into the router perform a ‘debug ip packet detail’.