The correct answer is: D. All of the mentioned.
Web scraping, webdredging, and webcleaning are all methods used to extract data from the HTML code of websites.
Web scraping is the process of extracting data from websites using automated tools. This data can then be used for a variety of purposes, such as creating price comparison websites, tracking stock prices, or generating reports.
Webdredging is a type of web scraping that involves extracting data from a large number of websites. This data can then be used to create a database or to track trends.
Webcleaning is a type of web scraping that involves removing unwanted data from the HTML code of a website. This data can include ads, social media buttons, and other elements that can interfere with the extraction of data.
All three of these methods can be used to extract data from the HTML code of websites. The best method to use will depend on the specific needs of the user.