The legacy program for listing files in the printer queues from the command line is:
A.
lpd
B.
lpr
C.
lpstat
D.
lpq
Explanation:
From the man pages:
lpq shows the current print queue status on the named printer. Jobs queued on the default destination will be shown if no printer or class is specified on the command-line.A) does not exist
B) sends a file (or stdin) to the printer
C) prints cups status information