Option D: Watermark refers to semitransparent text or a faint object that appears behind the document content.
Step-by-step explanation:
Footer: This is a text which appears in the bottom of every page. Mostly page numbers and the name of the publisher or the company name will be in the footer.
Page Color: This represents the color of the page
Page border: This option provides border to the page. The border can be thin or thick according to the requirement.
Watermark: This is the right answer. A watermark is added such that your content cannot be used by anyone else without permission. When you copy the text, the water mark also gets copied, thus avoiding plagiarism.