In November of 2005 It Was Discovered That Many of the New

Multiple Choice

In November of 2005 it was discovered that many of the new CDs distributed by Sony BMG installed software when they were played on a computer.The software was intended to protect the CDs from copying.Unfortunately,it also made the computer vulnerable to attack by malware run over the Internet.The scandal and resulting backlash was very costly.The software installed by the CDs is a

A) virus.
B) worm.
C) rootkit.
D) squirrel.