Identify the diagram that best represents the relationship among the given classes:
Politician, Minister, Human

Let's understand the logical relationship among the three groups:
All Ministers are inherently Politicians. Thus, the circle for Ministers lies entirely inside the circle for Politicians.

All Politicians (and consequently all Ministers) are Humans. Thus, both circles lie entirely inside the largest circle representing Humans.

This forms a concentric set of three circles, which corresponds to diagram C.