This Graph Demonstrates the Domestic Demand and Supply for a Good,as

This graph demonstrates the domestic demand and supply for a good,as well as a tariff and the world price for that good.
According to the graph shown,if the economy were open to free trade,the domestic quantity supplied would:

A) drop from 815 to 250.
B) drop from 815 to 500.
C) increase from 250 to 500.
D) increase from 815 to 1500.