The correct answer is:

(A) @ character cannot be used as a bookmark name

This statement is not true. In LibreOffice Writer, the @ character can be used as part of a bookmark name.

The other statements are true:

• (B) The Navigator can be opened with F5 and is used to jump to specific bookmarks.
• (C) The lower list in the Navigator contains all the bookmarks in the current document.
• (D) To delete a bookmark, you can select it and press the Delete button.