选择一个选项将该句补充完整：Due to differences in customs clearing times between the individual countries，（）cannot be guaranteed on all international shipm ents.A、shipping feesB、delivery timeC、paymentD、shipping cost
题目内容(请给出正确答案)
选择一个选项将该句补充完整：Due to differences in customs clearing times between the individual countries，（）cannot be guaranteed on all international shipm ents.
