____ is Outlook's default message format.

A) Plain Text
B) STMP
C) Rich Text
D) HTML

Default Message Format

The pre-set configuration used for creating and sending messages in email and messaging applications, such as plain text or HTML.

HTML

A markup language used for creating and structuring content on the World Wide Web.

Rich Text

A text format that supports various formatting options like bold, italics, and colors as opposed to plain text.