A. System Software
B. None of these
C. Application Software
D. Operating System
🧠 Explanation:
Windows 9 and Windows 10 are operating systems developed by Microsoft, managing computer hardware and software. Windows 10, released in 2015, introduced features like Cortana and universal apps, while Windows 9 was skipped to avoid version confusion. Operating systems are critical for device functionality, supporting tasks from browsing to gaming. Studying them highlights their role in modern computing, user experience, and technological evolution, a key topic in computer science and IT, shaping digital workflows globally.
