When the Nation of Worldova Allows Trade and Becomes an Exporter

When the nation of Worldova allows trade and becomes an exporter of silk,

A) residents of Worldova who produce silk become worse off; residents of Worldova who buy silk become better off; and the economic well-being of Worldova rises.
B) residents of Worldova who produce silk become worse off; residents of Worldova who buy silk become better off; and the economic well-being of Worldova falls.
C) residents of Worldova who produce silk become better off; residents of Worldova who buy silk become worse off; and the economic well-being of Worldova rises.
D) residents of Worldova who produce silk become better off; residents of Worldova who buy silk become worse off; and the economic well-being of Worldova falls.