Privacy concerns dictate that _______.

AYou always enter mass email addresses into the BCc

BMemorandums be sent without a From header.

CBusiness letters should be sent from a Post Office

DE-mails are deleted after they are sent

Verified Answer :

Privacy concerns dictate that A. You always enter mass email addresses into the BCC.

I believe the answer is: a. You always enter mass email addresses into the BCc  

In this context, bcc refers to blind carbon copy. When you put an Email address of a certain recipients on bcc fields, other recipients would not be able to see it. Doing this could  prevent the spread of computer malware, spam, or viruses by avoiding the perpetrators to accumulate  block-list of e-mail addresses available to all Bcc.