Which of the following commands accomplish this?

You want to use netcat to generate huge amount of useless network data continuously for various performance testing between 2 hosts. Which of the following commands accomplish this?

A.
Machine A #yes AAAAAAAAAAAAAAAAAAAAAA |nc -v -v -l -p 2222 > /dev/null Machine B #yes BBBBBBBBBBBBBBBBBBBBBB | nc machinea 2222 > /dev/null

B.
Machine A cat somefile |nc -v -v -l -p 2222 Machine B cat somefile | nc othermachine 2222

C.
Machine Anc -l -p 1234 | uncompress -c | tar xvfp Machine B tar cfp – /some/dir | compress -c | nc -w 3 machinea 1234

D.
Machine A while true : do nc -v -l -s -p 6000 machineb 2 Machine B while true ; do nc -v -l -s -p 6000 machinea 2 done