Final answer:
The shortcut to create a ripple edit trim without selecting the tool is B. This is specifically relevant in video editing platforms like Adobe Premiere Pro. Other provided shortcuts serve different functions.
Step-by-step explanation:
The keyboard shortcut you can use to create the ripple edit trim without selecting the tool in the timeline is B.
This shortcut enables you to quickly select the Ripple Edit tool in video editing software such as Adobe Premiere Pro.
The other shortcuts provided, such as Ctrl+Alt+W, W, and Ctrl+W, serve different functions and are not related to activating the Ripple Edit tool without needing to manually select it from the tool menu.