Consider Figure 4.2. With free trade, the United States achieves market equilibrium at a price of $____. At this price, ____ tons of steel are produced by U.S. firms, ____ tons are bought by U.S. buyers, and ____ tons are imported.
A.
$450, 5 tons, 60 tons, 55 tons
B.
$475, 10 tons, 50 tons, 40 tons
C.
$525, 5 tons, 60 tons, 55 tons
D.
$630, 30 tons, 30 tons, 0 tons