The correct answer is C. Hyperlink.
A hyperlink is a word, phrase, or image that, when clicked, takes the user to another location or opens a file. Hyperlinks are often used in web pages and email messages, but they can also be used in documents created in Microsoft Word.
To create a hyperlink in Word, select the text or image that you want to link, and then click the Insert tab. In the Links group, click Hyperlink. In the Insert Hyperlink dialog
box, select the type of link that you want to create, and then enter the address of the link or the path to the file that you want to link to. Click OK to create the hyperlink.When you click a hyperlink, Word will open the linked file or web page. If the linked file is not on your computer, Word will open a dialog box that allows you to download the file.
SmartArt is a feature in Word that allows you to create diagrams and charts. Bookmarks are a feature in Word that allows you to mark specific locations in a document. Cross-references are a feature in Word that allows you to create links to other parts of a document.
I hope this helps!