73. Regarding 3D printing technology, which of the following statements is incorrect? (A) Fused deposition modeling uses heated materials that soften and then stack layer by layer to form a shape. (B) Stereolithography uses photosensitive resin and light exposure to solidify materials into a shape. (C) Laser powder sintering technology generates a large amount of waste during the manufacturing process. (D) 3D printing can be used for manufacturing industrial parts and medical models.