There seems to be a mistake in the question. The correct answer for the widely used programming language for creating web pages and web applications should be option 'C' - HTML.

HTML (Hypertext Markup Language) is the standard markup language used for creating web pages and web applications. It is a fundamental building block of the World Wide Web and is responsible for the structure and presentation of content on the web. Here is a detailed explanation of why HTML is the widely used language for web development:

HTML Structure:
HTML provides a structured way to define the content of a web page. It uses a set of tags to define different elements such as headings, paragraphs, links, images, tables, forms, etc. These tags provide a semantic meaning to the content, making it easier for browsers and search engines to understand the structure and purpose of the page.

Cross-Platform Compatibility:
HTML is supported by all major web browsers and can be rendered on any operating system. This cross-platform compatibility ensures that web pages and applications built with HTML can be accessed by users on different devices, including desktops, laptops, tablets, and smartphones.

Easy to Learn and Use:
HTML has a simple and intuitive syntax, making it easy to learn and use for beginners. It does not require complex programming knowledge and can be written using a plain text editor. HTML tags are self-explanatory, and developers can quickly understand their purpose and usage.

Integration with Other Technologies:
HTML can be easily integrated with other technologies such as CSS (Cascading Style Sheets) for styling and JavaScript for interactivity. CSS allows developers to define the visual presentation of HTML elements, while JavaScript adds functionality and interactivity to web pages. This combination of HTML, CSS, and JavaScript forms the foundation for building modern web applications.

Continuous Evolution:
HTML is continuously evolving with new versions being released regularly. The latest version, HTML5, introduced many new features and APIs that enhance the capabilities of web applications, including multimedia support, offline storage, geolocation, and canvas for graphics.

In conclusion, while JavaScript is an essential programming language for adding interactivity to web pages, HTML is the primary language used for creating the structure and content of web pages and web applications. It provides a standardized way to define the elements and layout of a web page, ensuring cross-platform compatibility and easy integration with other technologies.