Case 11-3 Mac Has Recently Started Working as a Data-Entry

Case 11-3 Mac has recently started working as a data-entry officer. To polish his job skills, Mac is learning the various Microsoft Word formatting and text enhancing styles.
Mac uses a page number field to add page numbers to a document he has created. If Mac wants to insert the page number at the bottom of every page, he should insert it in the document's _____.

A) hyperlink
B) watermark
C) footer
D) link