听力原文:Under the documentary credit, banks are in no way concerned with the sales contract on which the credit may be based. (3)
A.
Banks will deal with the documentary credit along with the sales contract.
B.
Banks take no care of the sales contract while dealing with the documentary credit.
C.
Documentary credit and the sales contract are both important to banks.
D.
Banks will care for either the documentary credit or the sales contract.