With regard to international trade, what is the "law of one price"?
◦ The price of a product that is costless to transport will be the same in all markets.
◦ The price of a product worldwide is always equal to the cost of production from the country with the lowest opportunity cost to make the product.
◦ The price of a product is always equal to the absolute cost of the resources that went into its production in any country.
◦ The price of labour, measured in terms of its opportunity cost, is the same in all markets.
◦ The price of natural resources is the same in all markets.