Solution:
The image shows a question about the cross-section of a right rectangular prism when sliced by a plane that passes through both bases and is perpendicular to those bases.When a right rectangular prism is sliced in such a manner, the resulting shape of the cross-section will be the same shape as the base. Since the base of a right rectangular prism is a rectangle, the shape resulting from the slicing will also be a rectangle.Therefore, the correct answer is:c) rectangle