Answer:
Option (b) is correct.
Explanation:
Rachel take:
1 hour to make one pie and 2 hours to bake a loaf of bread
Joey take:
4 hours to make one pie and 4 hours to bake a loaf of bread
Therefore,
Rachel is specialize in making bread because she can produce same quantity of pie with comparatively less amount of resources.
Joey is left with only one choice because Rachel is already producing pie, hence, Joey is specialized in producing bread and therefore, they can maximize the entire or combine output.