How can you add a comment in CSS?

In CSS, a comment can be added using the syntax /* comment text */. This format allows you to include notes or explanations within your CSS code without affecting the rendering of the styles. The text between the /* and */ is ignored by the browser, making it a useful way to clarify the purpose of certain styles, document your thought process, or temporarily disable specific code during debugging.

The other options are not valid CSS comment syntax. The use of // comment text is a style of comment found in programming languages like JavaScript, but it is not recognized in CSS. The <!-- comment text --> syntax is specific to HTML comments; using it in CSS would not be effective, as browsers would not interpret it as a comment. The /*# comment text */ format is invalid as well, since the inclusion of the hashtag does not conform to CSS comment conventions. Only the standard /* comment text */ will correctly create a comment in your CSS files.