A. To adjust the font size and style of the document.
B. To collaborate and review document changes made by multiple users.
C. To automatically save the document at regular intervals.
D. To convert the document to a different file format.

Solution

B. To collaborate and review document changes made by multiple users.

Explanation

The primary purpose of using the "Track Changes" feature in LibreOffice Writer is to enable multiple users to make and review edits in a document collaboratively. This feature helps keep track of all modifications made to the document, such as insertions, deletions, and formatting changes, without permanently altering the original text. Here are some key aspects of the "Track Changes" feature: