Question ID:PT9 S4 Q6 Passage:The economies of some industrialized countries face the prospect of large labor shortages in the decades ahead. Meanwhile, these countries will have a vast number of experienced and productive older workers who, as things stand, will be driven from the work force upon reaching the age of sixty-five by the widespread practice of requiring workers to retire at that age. Therefore, if the discriminatory practice of mandatory retirement at age sixty-five were eliminated, the labor shortages facing these economies would be averted. Stem:The argument assumes that Correct Answer Choice:CChoice A:older workers have acquired skills that are extremely valuable and that their younger colleagues lack Choice B:workers in industrialized countries are often unprepared to face the economic consequences of enforced idleness Choice C:a large number of workers in some industrialized countries would continue working beyond the age of sixty-five if workers in those countries were allowed to do so Choice D:mandatory retirement at age sixty-five was first instituted when life expectancy was considerably lower than it is today Choice E:a substantial proportion of the population of officially retired workers is actually engaged in gainful employment