And the diameter of the ball is not much different from the side length on the bottom surface of the quadrangular prism,
Looking down from above, you will definitely see a circle.
See or not see the rectangle again,
If the side of the square is longer than the diameter of the ball, you will see option b,
If there is a cylinder below, the diameter of the bottom of the cylinder is equal to the diameter of the ball, as shown in option A,
If the bottom is a rectangle, the side of the rectangle is longer than the diameter of the ball, as shown in D,
C option graphics are impossible to see, and the rectangle should be a dotted line.
So choose C.