A person who uses his or her expertise to gain access to other people computers to get information illegally or do damage is a [Allahabad Bank PO 2011]

A person who uses his or her expertise to gain access to other people

1.	A person who uses his or her expertise to gain access to other people computers to get information illegally or do damage is a [Allahabad Bank PO 2011]
A.	spammer
B.	hacker
C.	instant messenger
D.	All of these
E.	None of these
Answer» C. instant messenger