信用证条款： DOCUMENTS REQUIRED: FULL SET OF CLEAN ON BOARD CHARTER PARTY BILL OF LADING MADE OUT TO ORDER，MARKED FREIGHT PAYABLE AS PER CHARTER PARTY． 假定：船东为XYZ SHIPPING CO.，货运代理人ABC SHIPPING CO.作为船东的代理人签发租船提单，签发人为张三，如果租船提单表面未表明船东及货运代理人的名称和身份，则提单的签发人应为( )。
A．ABC SHIPPING CO. 张三AS THE CARRIER
B．ABC SHIPPING CO. 张三AS AGENT FOR THE CARRIER: XYZ SHIPPING CO.
C．ABC SHIPPING CO. 张三AS AGENT FOR THE OWNER: XYZ SHIPPING CO.
D．XYZ SHIPPING CO. 张三AS THE OWNER
