solve

In the formula V = [ A(u) du used to compute the volume of a solid: A. the function A(u) represents the area of the intersection between a plane (perpendicular to an axis) and the solid. B. the function A(u) represents cross-sectional area. O C. the du can be thought of as representing the thickness of the axis of revolution. D. the function A(u) represents the cross-sectional area AND the the area of the intersection between a plane (perpendicular to an axis) and the solid. E. the function A(u) represents the cross-sectional area and the du can be thought of as representing the thickness of the axis of revolution