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The knowledge of HTML and CSS is considered essential for the job of a webmaster. The correct option is (d).

What is HTML?

An HTML is a basic computer programming language. Any webpage or code can be written using HTML.

CSS stands for Cascading Style Sheets and HTML  stands for Hypertext Markup Language.

HTML and CSS are two of the core technologies for making Web pages. HTML provides the structure of the page, CSS the (visual and aural) layout, for a variety of devices.

So, the knowledge of HTML and CSS is considered essential for the job of a webmaster.

Thus, the correct option is (d)

Learn more about HTML.

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