Which of the Following Is One Conclusion of the Heckscher-Ohlin

Which of the following is one conclusion of the Heckscher-Ohlin model?

A) In the real world, with unlimited goods, nations will buy products that satisfy their demands and sell products they have no use for.
B) If there are limited resources, such as capital and land, production varies directly with the amount of labor used.
C) Some factors of production are fixed and some are variable. We need only consider the variable factors when we analyze international trade.
D) With two goods and two factors, each country will export the good that uses intensively the factor of production it has in abundance and will import the other good.