A.
Former require that one of the countries has absolute advantage in the two goods but latter does not
B.
Former requires one country to have at least absolute advantage in one of the trading goods over the other country but latter does not.
C.
Former does not require any of the country to have absolute advantage in any of the two goods but latter require that one of the countries should have absolute advantage in all the goods.
D.
Former does not require any of the country to have absolute advantage in any of the two goods but latter require that one of the countries should have absolute advantage in at least one of the goods.