Refer to the Accompanying Graph, Where S_d and D_d Are

Refer to the accompanying graph, where S_d and D_d are the domestic supply and demand curves for a product. The world price of the product is $6. If an import quota of 40 units were imposed on the product, then the equilibrium price would be

A) $6 and the quantity consumed 80 units.
B) $8 and the quantity consumed 70 units.
C) $10 and the quantity consumed 60 units.
D) $12 and the quantity consumed 50 units.