Which of the following is L/C/？（）

Which of the following is L/C/？（）
A.The issuing bank takes the first responsibility to pay.
B.L/C is a transaction of documents.
C.L/C is independent on trade contract.
D.It is based on bank credit.
正确答案：The issuing bank takes the first responsibility to pay.L/C is a transaction of documents.L/C is independent on trade contract.It is based on bank credit.