COULD YOU TELL ME WHAT A...IS USED FOR

3/ - HE THONG DE KIEM TRA TRAC NGHIEM 15''''ANH 10 CB 2
HE THONG DE KIEM TRA TRAC NGHIEM 15''''ANH 10 CB 2

3/ Could you tell me what a...is used for? -Well , it is used to send and receive letters quickly.

a

printer

b

air conditioner

c

fax machine

d

cell phone