Please help with the following international trade question:

Figure 6 Price, P S PT C Pw D Quantity, Q QT = consumer loss (a + b + c + d) = producer gain (a) government revenue gain (c + e) Question 33 (1 point) Referring to the figure above (Figure 6), the economic efficiency gains in eliminating the tariff and equalizing domestic and world prices are -- according to orthodox trade theory -- equal to: Oatb+c+d Ob+d Octe Oe O mc2