If you want to print a listing of your computer’s mail queues, what command would you use?

A.
sendmail -l

B.
lpq

C.
mailq

D.
mlq

Explanation/Reference:
From the man pages:
mailq  List the mail queue. Each entry shows the queue file ID, message size,  arrival  time, sender, and the recipients that still need to be delivered.  If mail could not be delivered upon  the  last attempt, the reason for failure is shown. This mode of operation is implemented by executing the postqueue(1) command.

A) there is no -l option in sendmail
B) print queue status
D) does not exist