In CSS, what is the correct way to begin a comment?

• A. /*
• B. --
• C. #
• D. /**

Answer: (A)

In CSS, comments are initiated with the syntax /*. This is the correct way to start a comment block, allowing developers to include notes or explanations within their code that will not be rendered in the final output. The comment must end with */ to indicate that the comment block is complete.

The other options provided do not represent valid comment syntax in CSS. For instance, -- is used in certain programming contexts, such as for comments in SQL or defining custom properties in CSS (CSS variables), but it does not serve the purpose of starting comments. The # symbol is widely used in CSS for defining IDs and also for hexadecimal color codes, but it is not used for comments. The syntax /** is often seen in documentation comments in languages like Java, but in CSS, it is not a valid comment starter. Therefore, using /* is the correct approach to including comments in CSS code.