Correct Response: D. E-mail is the most recognized form of business communication, but it is not entirely confidential or secure. One of the most important issues concerning e-mail is privacy. If the email is not completely encrypted, the security of the message could be compromised during transmission, allowing non-intended recipients to gain access to sensitive information. This could have harmful effects on a business. While viruses can be transmitted through e-mail attachments (A), a virus will not necessarily compromise a sensitive message. Typographical errors (B) are embarrassing, but they are not as damaging as compromised security and loss of business secrets. While it may be difficult to project the appropriate tone in an e-mail (C), and the wrong tone could cause offense, security needs to remain the most important concern.