Select the Venn diagram that best illustrates the relationship between the following classes:
$$\text{Potatoes, Vegetables, Grapes}$$

All potatoes are classified under vegetables, so the circle representing 'Potatoes' must be entirely enclosed within the circle for 'Vegetables'. On the other hand, 'Grapes' is a fruit and has no intersection with either potatoes or vegetables, so its circle must remain completely independent and detached.
Thus, the ideal representation consists of one circle inside another, accompanied by a third standalone circle.