Select all choices that apply : which items describes the technology of the hanging gardens? a: slaves powered the equipment used to move water to the top of the hanging gardens. b: terraces were built so shades trees, exotic shrubs, and colorful flowers could be planted high up on the walls. c: the green plants on the terraces were native to babylon d: metal plates reflected light to make up for shortage of sunlight in the area. e: fountains, pools , and waterfalls cooled the gardens.