The Graph Shown Demonstrates the Domestic Demand and Supply for a Good

The graph shown demonstrates the domestic demand and supply for a good, as well as a tariff and the world price for that good. If the economy was originally operating in autarky, after moving to free trade the overall impact on surplus would be a net:

A) gain of areas F + G + I + J + K + L.
B) loss of areas F + G + I + J + K + L.
C) gain of areas F + G + J + K.
D) loss of areas F + G + J + K.