The left vertical plane intersects the horizontal plane at line x. The right vertical plane intersects the horizontal plane at line w. Line y intersects line x at point B and intersects line w at point A. Line v extends vertically through the horizontal plane. Line z extends horizontally through the left vertical plane. Point C is on the lower half of the left plane is on line z. Point D is on line z but not on the left vertical plane. Point E is on the lower half of the right plane. Use the given diagram to answer the question. Which line is the intersection of two of the planes shown?