____the unforeseen difficulties on the part of the suppliers wer

____the unforeseen difficulties on the part of the suppliers were great being unable to ship the goods within the time limit of your L/C.
A、Owing to
B、As
C、Because
D、Since
【正确答案】：A
【题目解析】：owing to由于，因为，其后接名词短语；as由于，因为，其后接完整的句子；because因为，其后接句子；since因为，其后接句子。