Answer:
B. promoting the general welfare
Step-by-step explanation:
International trade is the environment in which countries trade goods that each produces. This is a way of improving economies and securing the supply of products in all countries involved. For example, if a country does not produce fruit but produces manufactures, that country may trade with a country that produces fruit but does not manufacture. In this way, citizens of both countries will have access to both types of products and social welfare improves.