题目内容：
根据以下资料回答题A large number of documents are used in the modern international trade such as marine bill ot lading, letter of credit, insurance policy, commercial invoice, packing list, air waybill, certificate of origin, packing list, multimodal transport document, parcel post receipt, rail waybill etc. The( 41 ) evidences the contract of carriage of goods by at least two modes of transport. The ( 42 ) evi-dences the contract of carriage of goods by air. Unlike B/L,( 43 )evidences the contract of carri-age but is not a document of title and is not negotiable. The document issued by the carrier or his a-gent to enable the consignee or his forwarding agent to take delivery of the imported cargo from the vessel or port is called( 44 ). ( 45 ) is a document issued by the authorized body in the exporter' s country stating the country of origin of the goods.
A．MTD B．B/L
C．AWB
D．L/C
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