The answer is (c): the suitcase will rotate with its lower end moving to the right, as seen in an mpeg video by clicking your mouse on the photograph below.
Note that in this case the vector angular momentum originally points outward toward the camera. When you rotate the suitcase clockwise as viewed from above, you exert a vector torque in the downward direction. (Try it with a bicycle wheel gyroscope!) Therefore the angular momentum change must be in the downward direction, leading to a net angular momentum that is pointed to the left but slightly in the downward direction, as seen in the photograph and in the drawing at the right below. Click on the drawing at the left below to see what happens if you rotate the suitcase counterclockwise as viewed from above (Question #275).
