When the import declaration is conducted,
题型：单项选择题
问题：
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