Correct Option: A

<aside> element works like a sidebar. It defines some content aside from the content it is placed in. It should be related to the surrounding content. E.g. <aside> <h3> Florida </h3> <p> Florida is a very cold place. </p> </aside>. <footer> element contains copyright information about author/owner of the document. All navigation links are contained in <nav> element. <header> specifies heading for the document.