Answer: The Inbox is the first folder you will view by default.
Unread messages have a bold blue bar next to them.
Messages will be marked as "read" when you view them in the Reading Pane.
The bold blue bar will disappear when a message has been read
Step-by-step explanation:
The characteristics of the Outlook 2016 email include:
• The Inbox is the first folder you will view by default.
• Unread messages have a bold blue bar next to them.
• Messages will be marked as "read" when you view them in the Reading Pane.
• The bold blue bar will disappear when a message has been read.
It should be noted that while composing an email in Outlook 2016 email, it doesn't appear in the Sent folder, therefore option B is wrong. Other options given are correct.