Which option best describes the complete set of parts for an underground cable (as listed)?

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Underground cable is built with multiple layers, each serving a specific protective and functional purpose. The complete set includes the stranded conductors that carry the current, insulation around those conductors to prevent contact between them, polyethylene as the dielectric insulation material, a metallic shield that surrounds the insulation to control the electric field and provide a fault return path, and an outer jacket that protects everything from moisture, chemicals, and mechanical damage in the buried environment. If any part is missing, the cable wouldn’t meet the necessary electrical performance or durability for underground use. That’s why including all five parts describes the full, proper structure.