The table below shows the number of workers required to produce 1 unit of goods X and Y, for countries A and B. Country A Country B 1 unit of 8 workers 15 workers Good X 1 unit of 4 workers 5 workers Good Y In Country B, what is the opportunity cost of producing 9 units of good Y in terms of good X? Select one: a. 1 unit of good X O b. 2 units of good X c. 3 units of good X d. 4 units of good X e. 5 units of good X