What is the main goal of Extensible Hypertext Markup Language (XHTML)?

The primary goal of Extensible Hypertext Markup Language (XHTML) is to create a medium for transitioning from HTML to XML. This reflects XHTML's design as a reformulation of HTML 4.01 using the XML 1.0 specification, which fosters a stricter syntax and a more organized approach to web content. By adhering to the rules of XML, XHTML encourages developers to create documents that are cleaner and more maintainable, while also ensuring that they can be processed by both web browsers and other XML-based applications.

The other choices are not aligned with the primary purpose of XHTML. For example, while simplifying HTML coding might seem like a beneficial feature, it isn’t a defining goal of XHTML itself; the focus is on ensuring compatibility and adherence to XML standards. Additionally, XHTML does not serve to replace JavaScript, which is a scripting language used to enhance interactivity and functionality on web pages. Lastly, while aesthetics can improve with better-structured code, enhancing website aesthetics is not a goal of XHTML; rather, it is a technical specification aimed at promoting better coding practices and ensuring interoperability.