To mark content that is related to the main article, you should use: c. the aside element.
What is the Aside Element?
In hypertext markup language, the aside element is used to include content that is related to the main article.
The additional information is meant to be considered apart from the parent article. They are usually presented as sidebars in the program.
Learn more about the Aside Element here:
https://brainly.com/question/14921860
