A. Delete Slide
B. Duplicate Selected Object or Slide
C. Save Presentation
D. Print Presentation

Explanation:

• Creates a copy instantly.
• Saves time when designing slides.
• Useful for repeated layouts.
• Helps maintain consistency.
• Commonly used by presenters.
• Improves productivity.
• Works on objects and slides.
• Easy shortcut.
• Frequently used in offices.
• Important keyboard command.