Please open the letter and tell me what it ____.

A.A. L/C is a self-sufficient instrument.

B.B. L/C is a document transaction.

C.C. The issuing bank's liabilities for payment.

D.D. L/C is a cargo transaction.

Please open the relevant L/C in time to ensure the fulfillment of the order.()

A.paper

B.text

C.book

Please open the Letter of Credit promptly at the contract price, () we cannot apply for export licence

A、lest

B、otherwise

C、or

D、and

A.take down

B.let down

C.put down

D.count down