There is a production possibilities frontier (ppf) that shows the combinations of goods x and y that can be produced in the economy. the point where the ppf touches the good-x axis is at 40 units of good x and the point where the ppf touches the good-y axis is at 60 units. as a result of an increase in resources that can be used for the production of both goods, the ppf a. shifts leftward, and the point at which the ppf touches the good-x axis has to be something less than 40 units of good x. b. shifts rightward, and the point at which the ppf touches the good-x axis has to be something more than 40 units of good x and the point at which the ppf touches the good-y axis has to be something more than 60 units. c. shifts leftward, and the point at which the ppf touches the good-x axis has to be something less than 40 units of good x and the point at which the ppf touches the good-y axis has to be something less than 60 units. d. shifts rightward, and the point at which the ppf touches the good-x axis has to be something more than 40 units of y and the point at which the ppf touches the good-y axis has to be something less than 60 units. e. none of the above