How can you add a 3-D Extrude and Bevel effect to an object in Illustrator?

To add a 3-D Extrude and Bevel effect to an object in Adobe Illustrator, the correct approach is to go through the 'Effect' menu and then select '3D' followed by 'Extrude & Bevel'. This method allows you to apply a comprehensive set of 3-D features, which includes adjusting the depth of the extrusion and the angle of the bevel.

This choice is accurate because it utilizes the designated effects menu specific to Illustrator’s functionality for rendering 3-D designs. When selected, it opens a dialog box that lets you customize various parameters, such as lighting and perspective, enabling the object to have more depth and realism.

Other methods listed, such as navigating through 'Object', 'Layer', or 'Filter', do not provide the right pathway for applying this specific effect in a straightforward manner, as they either lead to different settings or are simply not an option within the Illustrator interface for 3-D effects.