Correct Answer:
B. Ctrl + M
In modern versions of Microsoft PowerPoint (2007 and later), a new slide is inserted by selecting Home → New Slide. Users can also press the keyboard shortcut Ctrl + M, which is the quickest way to add a new slide.
In older versions of PowerPoint (2003 and earlier), the option Insert → New Slide was commonly used.
Correct Answer: Home → New Slide