Final answer:
Option (A), The shortcut for MIDI Mapping is Ctrl + M on Windows or Cmd + M on macOS in Ableton Live, allowing you to assign MIDI device controls to interface elements in the software.
Step-by-step explanation:
The shortcut for MIDI Mapping depends on the specific software you are using. For example, in Ableton Live, the shortcut is Ctrl + M on Windows or Cmd + M on macOS. To enter MIDI Map mode, you press this combination and then click on the interface element you want to control with your MIDI device. Once it's highlighted, you manipulate the control on your MIDI device to assign it. To exit MIDI Map mode, you press the same combination again.