Final answer:
The Bcc line of an email message is not visible to all recipients.
Step-by-step explanation:
The subject of this question is Computers and Technology. The grade level is High School.
The statement in the question is not accurate. The Bcc (blind carbon copy) field in an email message allows the sender to include recipients who will be hidden from other recipients. This means that recipients in the To and Cc fields won't be able to see the Bcc line, ensuring their privacy and preventing a mass email from revealing everyone's addresses.
For example, if you're sending an email to multiple people but you don't want them to know who else received the email, you can use the Bcc field to add their addresses without displaying them to others.