Answer: a. 15
Step-by-step explanation:
Given;
Labour hours available to each nations.
England = 40 labour hours.
Spain = 40 labour hours.
Solution:
Total production of bread in 40 labour hours for each nation from the table is 15.
England = 10
Spain = 5
Since both nations decided to focus on their strength where they pose comparative advantage, the production of cheese would increase by 15. As this is the amount of bread produced in that time frame of 40 labour hours.