A

Step 1: Understand the concept of stability. The stability of an object refers to its ability to return to its original position after being disturbed. This is largely dependent on the center of mass and the base of support of the object.
Step 2: Analyze the shapes involved. The cube and the cylinder both have the same height and weight. However, their shapes differ significantly. The base of support for the cube is its square face, while for the cylinder, it is its circular base.
Step 3: Determine the center of mass for both shapes. The center of mass for the cube is at its geometric center, while for the cylinder, it is also at its center but distributed more evenly around that center due to its circular shape.
Step 4: Compare the base widths. A cylinder has a wider base when considering rolling over due to its circular shape, allowing it to dissipate force better when pushed. In contrast, a cube, while having square edges, has a narrower point of stability at the corners compared to a cylinder.
Step 5: Conclusion: The cylinder is generally harder to overturn due to its design allowing for a lower center of gravity and more stability across its circular base.
Therefore, the answer is the cube is easier to overturn than the cylinder.