Question: A Category 2 Hardened Carrier is constructed using aluminum pipe. Is this material appropriate for a Category 2 Hardened Carrier? Why or why not? Question Select one: a. Yes, a Category 2 Hardened Carrier can be constructed using any metal material. b. No, a Category 2 Hardened Carrier must be constructed of a polyvinyl chloride (PVC) pipe that is schedule-120 grade. c. No, a Category 2 Hardened Carrier must be constructed of a ferrous material. d. Yes, a Category 2 Hardened Carrier must be constructed of aluminum.