Which of the following should be scanned for viruses?

A.
Executable files.

B.
All of the above.

C.
Plain text documents.

D.
Microsoft Word documents.

Explanation:

Many newer viruses spread using email. The infected system includes an attachment to any email that you send to another user. The recipient opens this file thinking it is something you
legitimately sent them. When they open the file, the virus infects the target system. Many times the
virus is in an executable attachment.
Reference:
Mike Pastore and Emmett Dulaney , Security+ Study Guide , 2nd Edition, Alameda , Sybex , 2004,
p 78