Stability depends on the lowest center of gravity

Steps:

• All objects share identical shapes, so they have the same base width for support.
• An object's stability is determined by the height of its center of gravity (CG) relative to the base; lower CG resists toppling better.
• Toppling occurs when the vertical line through the CG falls outside the base during tilt.
• Compare CG positions: the lowest CG requires the greatest tilt angle to topple, indicating highest stability.

Why C is correct:

• C has the lowest CG, maximizing the tilt angle needed for toppling per the stability principle for rigid bodies.

Why the others are wrong:

• A: Higher CG allows easier toppling with smaller tilt.
• B: Elevated CG reduces stability compared to C.
• D: CG position is higher than C's, permitting quicker toppling.

Final answer: C