题目内容：
When the import declaration is conducted, the person in charge of the matter should submit, together with the import declaration form, the following commercial and shipping documents, they are ______.
A．Invoice and B/L only
B．Invoice, B/L, Packing list only
C．Invoice, B/L, Packing list, the duty exemption certificate issued by Customs
D．none of the above
参考答案：