【单选题】What is the main difference between the Hechscher-Ohlin model and the Ricardian model?
A.
What is the main difference between the Hechscher-Ohlin model and the Ricardian model? Unlike in the Ricardian model, endowments of factors of production affect trade patterns in the Hechscher-Ohlin- model.
B.
Unlike in the Ricardian model, factors are mobile across industries in the Hechscher-Ohlin model.
C.
Unlike in the Ricardian model, trade is not assumed to be free in the Hechscher-Ohlin model.
D.
Unlike in the Ricardian model, all factors of production gain as a result of trade in the Hechscher-Ohlin- model.