单选题Currently， different types of multimodal transport operations involving different combinations are taking place.（）transport does not refer to multimodal transport.ASea/airBSea/roadCSea/railDSea/sea
单选题
Currently， different types of multimodal transport operations involving different combinations are taking place.（）transport does not refer to multimodal transport.
A
Sea/air
B
Sea/road
C
Sea/rail
D
Sea/sea
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