Extracted text: Starting from the Core to the Serving, the proper order of the layers of the Underground Cable is O A. CORE, CONDUCTOR SHIELD, INSULATION, METALLIC SHIELD, INSULATION SHIELD, BEDDING, ARMORING, AND SERVING. O B. CORE, CONDUCTOR SHIELD, INSULATION, INSULATION SHIELD, METALLIC SHIELD, BEDDING, ARMORING, AND SERVING. OC. CORE, INSULATION SHIELD, INSULATION, CONDUCTOR SHIELD, METALLIC SHIELD, BEDDING, ARMORING, AND SERVING. O D. CORE, CONDUCTOR SHIELD, INSULATION, INSULATION SHIELD, METALLIC SHIELD, ARMORING, BEDDING, AND SERVING.