The Diagram Below Shows the Domestic Demand and Supply Curves

The diagram below shows the domestic demand and supply curves for denim jeans in Canada.The prevailing world price is PW.Assume that all jeans are identical.
FIGURE 34- 2
-Refer to Figure 34- 2.Suppose Canada has free trade in jeans and then imposes a tariff of $t per pair.Canada's jean- producing firms will gain producer surplus equal to the area

A) A.
B) A + B + C.
C) A + D.
D) D.
E) D + E + F + G + H.