To determine which option represents the part that was erased from the drawing of a mug, we need to focus on the typical features of a mug. A mug usually has a cylindrical shape with a handle. The handle is essential for gripping and usually extends from one side of the mug, appearing as a horseshoe or "C" shape.
Given the options, we should look for a shape resembling a typical mug handle. Here are the steps:
Thus, the correct option is: