题目内容：
根据下列选项，回答题。There are three basic steps in the procedure of an L/C operation．The first step is the issuance of the L/C—the process of a 1 applying for and opening a documentary credit at the 2 bank，and the issuing bank’s notification of the L/C to the 3 through the 4 bank．The second step is the amendment to the L/C if necessary--the process whereby the terms and conditions of a documentary credit after the credit has been issued． The third step is the utilization and settlement--the process whereby the 5 ships the goods，transfers the documents from the seller to the buyer through banks，and transfers the proceeds from the buyer to the seller through banks in different ways(the settlement)． However，the documentary procedure varies with the type of L/C．
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