7. Production possibilities frontiers are usually bowed outward. This is because i) the more resources a society uses to produce one good, the fewer resources it has available to produce another good. ii) the opportunity cost of producing a good increases as more and more of that good is produced. iii) of the effects of technological change. iv) resources are specialized; that is, some are better at producing particular goods rather than other goods. a. ii) and iv) b. iv) ONLY c. i) and ii) d. i), ii) and iii)