A) interface between the hardware and application programs

B) collection of programs that manages hardware resources

C) system service provider to the application programs

D) all of the mentioned

Correct Answer: all of the mentioned
Explanation: Example of Operating System are: Android, Windows, iOS, KaiOS, Linux, Macintosh, Smart TV, Tizen, Amazon Fire OS, Chrome OS, WebOS, Windows Mobile, Chromecast , Roku OS, PlayStation, Xbox, Apple tvOS, Blackberry, Nintendo Switch, Wii