You need to send a copy of a proposal from your office to a customer. The customer has a
multifunction printer. The printer is a combination computer printer and fax machine.
You feed a copy of the proposal into your fax machine. The customer calls and says that the fax
he received has a black line running from the top to the bottom of the page. You then e-mail the
customer a copy of the proposal. The customer receives the proposal on his computer, and prints
out a copy on the printer. The new copy looks fine.
The black line was probably caused by:
A. the word processing software.
B. the sending fax machine.
C. the receiving fax machine.
D. noise on the phone lines.