A polymorphic virus is _____________.

A.
A virus that makes copies of itself and then makes changes to those copies

B.
A virus that can make itself stealth

C.
A virus that is written in a macro language

D.
A virus that is written in visual basic

E.
A virus that infects the boot sector of a hard drive

Explanation:
A polymorphic virus is a virus that makes copies of itself, then makes changes to those copies. It
does this in hopes of avoiding detection of anti-virus software.