Select the documents required to ship a Category A substance by air.

• A. Air Waybill, Shipper's Declaration, and itemized list of contents
• B. Air Waybill and packing list
• C. Shipper's Declaration and safety data sheet
• D. Shipper's Declaration only

Answer: (A)

Key idea: shipping dangerous goods by air requires specific transport documents that clearly communicate the hazards and contents to the carrier and authorities. The Air Waybill is the transport contract and is needed for every air shipment. For dangerous goods, the Shipper’s Declaration for Dangerous Goods is also required to certify the hazard information, classification, and packaging. When the substance is Category A, an itemized list of contents is typically provided to precisely identify what is in the shipment and to help with handling and emergency response. Put together, this trio covers the essential paperwork for air transport of a Category A substance. The other options miss one or more of these essentials (for example, not including the Air Waybill, or relying on a safety data sheet or packing list alone), so they don’t meet the full documentation requirements.