Arrange the following steps in the process of utilizing comparative advantage in international trade: A) Specialization in goods with lower opportunity costs, B) Trade between countries based on these specializations, C) Assessment of opportunity costs for different goods, D) Increased overall efficiency and welfare among trading nations.

To utilize comparative advantage in international trade, the first step is to assess the opportunity costs for different goods. This means understanding what each country gives up to produce a certain good. Next, countries will specialize in producing the goods where they have the lowest opportunity costs, which allows them to produce more efficiently. After specializing, countries will engage in trade based on these specializations, exchanging goods that they each produce efficiently. Finally, this process leads to increased overall efficiency and welfare among trading nations, as they can enjoy a greater variety of goods at lower prices.