What other command could Michael use to attempt to freeze up the router?

Michael is an IT security consultant currently working under contract for alarge state agency in New York. Michael has been given permission to perform any tests necessary against the agency’s network. The agency’s network has come under many DoS attacks in recent months, so the agency’s IT team has tried to take precautions to prevent any future DoS attacks. To test this, Michael attemptsto gain unauthorized access or even overload one of the agency’s Cisco routers that is at IP address 192.168.254.97. Michael first creates a telnet session over port 23 to the router. He uses a random username and tries to input a very large password to see if that freezes up the router. This seems to have no affect on the router yet. What other command could Michael use to attempt to freeze up the router?

A.
Michael could use the command: ping -l 56550 192.168.254.97 -t

B.
If Michael used the command: ping -r 999 192.168.254.97 -t, he could freeze up the router and then attempt to gain access.

C.
The command: finger -l9999 192.168.254.97 -m would force the router to freeze.

D.
Ping -l 254 192.168.254.97 would make the router freeze.