Consider a Market in a Small Country with a Domestic

Consider a market in a small country with a domestic demand curve of P = 60 - 2q and P = q.The world price for the good is $5.The government imposes an import tariff of $10 per unit.Which statement is true?

A) Imports fall by 15 units due to the imposition of the tariff.
B) Imports fall by 25 units due to the imposition of the tariff.
C) Imports fall by 10 units due to the imposition of the tariff.
D) Imports fall by 5 units due to the imposition of the tariff.
E) None of the above.