Final answer:
Option (A), In Ableton, the shortcut for duplicating a clip is Ctrl + D, which allows for efficient copying of musical ideas within the software.
Step-by-step explanation:
The shortcut in Ableton for duplicating a clip is Ctrl + D. To duplicate a clip, you simply select the clip in the session or arrangement view, and then use the shortcut keys. This will create an exact copy of the clip right after the original clip, allowing you to quickly build upon your musical ideas without having to manually copy and paste.