To Protect Computer Systems from Email Viruses and Hoaxes,you Should

Multiple Choice

To protect computer systems from email viruses and hoaxes,you should NOT

A) install a virus scan program and set it to scan all incoming email.
B) forward questionable messages to the email administrator.
C) forward all warning about viruses to those in your address book just in case they are real.
D) open email attachments with an ".exe" extension.