Suppose the domestic supply (Q S U.S. ) and demand (Q D U.S )for bicycles in the United States are given by the following set of equations: Q S U.S. = 2P Q D U.S. = 200 – 2P. Demand (Q D ) and supply (Q S ) in the Rest of the World are given by the equations: Q S = P Q D =160 – P. Quantities are measured in thousands and price in U.S. dollars. In the absence of international trade, _____ thousand bicycles will be sold in the Rest of the World at a per unit price of _____ . a. 80 ; $80 b. 100 ; $100 c. 50 ; $10 0 d. 100 ; $50