When should you use the 'defer' attribute in a script tag in HTML?

A. When you want the script to load before the HTML content. B. When you want the script to execute after the HTML content has been parsed. C. When you want the script to block the HTML parsing until it loads. D. When you want the script to load asynchronously.

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Explanation

The 'defer' attribute in a script tag ensures that the script is executed only after the HTML document has been fully parsed. This is useful for scripts that rely on the complete DOM being available before they run.

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When should you use the 'defer' attribute in a script tag in HTML?