What does "linearity" in transportation models imply?
A) Costs are not affected by the amount shipped
B) The relationship between supply and demand is proportional
C) Transportation routes have fixed costs
D) All costs are variable
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What does "linearity" in transportation models imply?
A) Costs are not affected by the amount shipped
B) The relationship between supply and demand is proportional
C) Transportation routes have fixed costs
D) All costs are variable