If country A is the lowest opportunity cost producer of X and country B is the lowest

Question:

If country A is the lowest producer of X and country B is the lowest producer of Y, what happens to their absolute and comparative advantages if country A suddenly becomes three times more productive at producing both X and Y than it was before?

Opportunity Cost
Opportunity cost is the profit lost when one alternative is selected over another. The Opportunity Cost refers to the expected returns from the second best alternative use of resources that are foregone due to the scarcity of resources such as land,...