The correct answer is: D. None of the above.
The contents of your computer’s hard drive are indexed by the operating system. The operating system is a software program that controls the basic functions of a computer, such as managing the file system, memory, and hardware. It also provides a user interface that allows you to interact with the computer.
The operating system indexes the contents of your hard drive so that it can quickly find files when you search for them. The index is stored in a special file on the hard drive. When you search for a file, the operating system looks in the index to find the file’s location on the hard drive.
Yahoo!, Google, and MSN are all search engines. A search engine is a website that allows you to search for information on the internet. Search engines index websites so that they can quickly find the websites that match your search terms.
However, search engines do not index the contents of your computer’s hard drive. If you want to search for files on your computer, you can use the search function in the operating system.