Which statement about headers and footers is correct?

Headers and footers in documents serve as areas where you can include information that appears on multiple pages, such as the document title, author name, page numbers, or even images and logos. Option C is correct because headers and footers are not limited to just text; they can also include images, graphs, and formatting styles. This functionality enhances the visual appeal and can help in branding or providing additional context within the document.

In contrast, the other statements are inaccurate. Headers and footers are versatile and fully editable, allowing users to customize them to their needs. They can contain various elements beyond simple text, including graphics and different formatting styles, which enriches the presentation of the document. Therefore, it is essential to recognize that headers and footers are meant to enhance a document's information and aesthetics, making option C the best choice.