Windows 10 Comes Installed on Many Computers

Windows 10 comes installed on many computers. While it has many "bells and whistles," its fundamental purpose is to perform all of the basic tasks needed to operate the computer at its most basic level and to provide an interface that allows the user to interact with the computer. What is Windows 10 an example of?

A) an information management system
B) a utility program
C) horizontal application software
D) operating system software