Refillable tanks used to ship CFC and HCFC refrigerants or used to recover these refrigerants must meet the standards of what entity?

Correct Answer: Option A — the United States Department of Transportation

Department of Transportation (DOT) specifications govern the manufacture, periodic testing, and certification of all refillable cylinders used to transport or recover CFC and HCFC marine refrigerants to ensure structural integrity under high pressure and temperature variations.