题目内容：
根据以下资料回答题Transportation is one of the most significant areas of(41 )because of its impact on customer service and the firm' s cost structure.The primary transportation value proposition is product movement up and down the supply chain.Without reliable transportation, most commercial activities could not function. The international (42) is nowadays frequently carried out in containers.Containers are particularly suitable for (43).If the exporter intends to fill a full container load, the forwarder or shipping line will prepare an empty container to the exporter for loading.If the cargo is (44), the exporter sends it to the container freight station, where it will be (45)with the goods of other exporters in a container.
A．logistics B．inventory
C．warehousing
D．packaging
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