In an hour, Henry can wash 20 windows or clean 2 bath tubs. In an hour, Rose can wash 30 windows or clean one bath tub. If their father Dave allows them to trade chores to achieve gains from trade, who will specialize in what?
Henry will wash the windows; Rose will clean bath tubs.
Henry and Rose will both clean bath tubs.
Henry will clean bath tubs; Rose will wash the windows.