You can damage the Vacuum Fluorescent Display on an HP ap5000 AiO POS System if you mistakenly
connect it to which port?

A.
COM1 port

B.
COM2 port

C.
COM3 port

D.
COM4 port

Explanation:

Reference:
ftp://ftp.moteselectronics.com/HP/All%20In%20One%20PC/AP5000%20(POS%20System)/hp%20ap
5000.pdf (page 26)