If More Foreign Steel Plants Relocate to the United States

If more foreign steel plants relocate to the United States, we would expect

A) the U.S. supply curve for steel to shift to the right.
B) the U.S. supply curve for steel would shift to the left.
C) that the U.S. steel market would not respond.
D) that U.S. steel demand might change, but U.S. steel supply would remain the same.