The shortcut used to activate calculator is A. Ctrl + N B. Ctrl + M C. Ctrl + A D. Ctrl + B

The correct answer is A. Ctrl + N.

The shortcut used to activate calculator is Ctrl + N. This shortcut is available on most Windows computers. To use it, hold down the Ctrl key and press the N key at the same time. The calculator will then open.

The other options are incorrect. Ctrl + M is the shortcut used to open a new document in Microsoft Word. Ctrl + A is the shortcut used to select all text in a document. Ctrl + B is the shortcut used to make text bold.

I hope this helps!