Correct Answer: DThe correct way to use clientlibs with Sightly involves using the 'data-sly-use' or 'data-sly-include' attributes to include the client library categories. The proper syntax to use clientlibs in Sightly is with 'data-sly-include' followed by the correct expression. Therefore, the correct way to write the syntax is <meta data-sly-include='${clientLib.all @ categories=\'your.clientlib\'}' data-sly-unwrap></meta>, making option D the correct answer.