Which of the following commands should be used to assure that a dump can be forced using the reset button on a system without a key switch? （）

A. It is useful for diagnosing data dependent problems by filling the packet with the byte pattern following the "f" in the command line. 
B. It is useful for flooding from slow character based terminals since it only displays a dot "." for each packet sent in fast mode. 
C. It is useful for flooding from slow character based terminals since it only displays a dot "."       for each packet sent and a backspace on returned in fast mode. 
D. The command can only be run by root.

A. lsqdev 
B. lpstat 
C. lptest 
D. prtconf

A. The external dump device is full. 
B. The dump device was not mirrored before the dump happened. 
C. The boot failed while copying the dump from paging space to a file. 
D. The dump device was not set to a paging device before the dump happened.