What is the law of comparative advantage

law of comparative advantage. states that countries gain when they produce items they are most efficient at producing and are at lowest opportunity cost. exports. goods and services produced in one country and sold to other countries. imports.

Explanation:

on the morning of  july 21,  1861, general mcdowell ordered the  unionarmy to attack. it was on this hill that  confederate  colonel thomas jackson and his forces held back theunion  troops.

"the attempts of the proletariat to rise above this abasement"