When you are collecting information to perform a data analysis, Google commands are very useful to find
sensitive information and files. These files may contain information about passwords, system functions, or
documentation.
What command will help you to search files using Google as a search engine?

A.
site: target.com filetype:xls username password email

B.
inurl: target.com filename:xls username password email

C.
domain: target.com archive:xls username password email

D.
site: target.com file:xls username password email

Explanation:
If you include site: in your query, Google will restrict your search results to the site or domain you specify.
If you include filetype:suffix in your query, Google will restrict the results to pages whose names end in suffix.
For example, [ web page evaluation checklist filetype:pdf ] will return Adobe Acrobat pdf files that match the
terms “web,” “page,” “evaluation,” and “checklist.”
http://www.googleguide.com/advanced_operators_reference.html