Question

If you cut a right rectangular prism parallel to its base, apply ink to the cross section, and stamp it on a sheet of paper, which shape will you get?

Answer 1

It would be B. If you imagine the second shape in the list to be 3 dimensional, it would be a right rectangular prism. If you make a cut horizontally parallel to the base, you're still left with what equates to the same original shape, only smaller, but maintaining the original shape.

Answer 2

By definition, a right rectangular prism is a solid shape of three dimension that has six rectangular faces. Then, its base is a rectangle. Keeping this on mind, if you cut the right rectangular prism parallel to its base, apply ink to the cross section, and stamp it on a sheet of paper, you will obtain a rectangle.
 
 Therefore, which shape will you get? The answer is the second option, which is a rectangle.