3. which of the following will not result in an outward shift of the production possibilities curve?
[a] the work force becomes more literate
[b] resources are used more efficiently.
[c] an increase in population.
[d] a technological breakthrough
[e] all of the above will shift the ppc outward.

The kamp family has twins, rob and rachel. both rob and rachel graduated from college 2 years ago, and each is now earning $50,000 per year. rachel works in the retail industry, where the mean salary for executives with less than 5 years' experience is $35,000 with a standard deviation of $8,000. rob is an engineer. the mean salary for engineers with less than 5 years' experience is $60,000 with a standard deviation of $5,000.