Consider a Market in a Small Country with a Domestic

Consider a market in a small country with a domestic demand curve of P = 28 - q and a domestic supply curve of P = 3q.The world price is $9 per unit.If the country opens itself up to international trade:

A) Total surplus increases by $60.
B) Total surplus increases by $56.
C) Total surplus increases by $88.
D) Total surplus increases by $36.
E) None of the above.