Why might salt be a resource with a high cost in one market and a very low cost in another
market?
a. Trade could affect costs.
b. Its supply could be scarce in one market and very great in another.
c. The higher cost market might have a much lower demand for salt than its supply.
d. The higher cost market might have no demand for salt.
e. The lower cost market might have more trade-offs for salt harvesting.