Answer:
A. Do not place anything in an e-mail you would not want the world to see.
Explanation:
An e-mail is the short term for electronic mail and it can be defined as a means of communication by providing a medium of sending data (informations) from one user to another over a network. Simply stated, an email allow users with an email address to send messages to another over the internet.
A piece of good advice regarding business emails would be, do not place anything in an e-mail you would not want the world to see because the messages contained in emails are presented bare not encrypted. Therefore, any private message (information) that a user do not want to get into the wrong hands shouldn't be sent in an email.
