单选题：Passage ThreeQuestions are based on the followingpassage.

Passage Three
Questions are based on the followingpassage.
Across the rich world, well-educated peopleincreasingly work longer than the less-skilled. Some65% of American men aged 62-74 with aprofessional degree are in the workforce, comparedwith 32% of men with only a high-school certificate.This gap is part of a deepening divide between thewell-educated well-off and the unskilled poor. Rapidtechnological advance has raised the incomes of thehighly skilled while squeezing those of the unskilled. The consequences, for individuals andsociety, are profound.
The world is facing an astonishing rise in the number of old people. And they will live longerthan ever before. Over the next 20 years the global population of those aged 65 or more willalmost double, from 600 million to 1.1 billion. The experience of the 20th century, when greaterlongevity (长寿) translated into more years in retirement rather than more years at work, haspersuaded many observers that this shift will lead to slower economic growth, while the swellingranks of pensioners will create government budget problems.
But the notion of a sharp division between the working young and the idle old misses a newtrend, the growing gap between the skilled and the unskilled. Employment rates are fallingamong younger unskilled people, whereas older skilled folk are working longer. The divide ismost extreme in America, where well-educated baby-boomers(二战后生育高峰期出生的美国人)areputting off retirement while many less-skilled younger people have dropped out of theworkforce.
Policy is partly responsible. Many European governments have abandoned policies that used toencourage people to retire early. Rising life expectancy(预期寿命), combined with thereplacement of generous defined-benefit pension plans with less generous defined-contribution ones, means that even the better-off must work longer to have a comfortableretirement. But the changing nature of work also plays a big role. Pay has risen sharply for thehighly educated, and those people continue to reap rich rewards into old age because thesedays the educated elderly are more productive than the preceding generation. Technologicalchange may well reinforce that shift: the skills that complement computers, frommanagement knowhow to creativity, do not necessarily decline with age.
注意：此部分试题请在答题卡2上作答。
What is happening in the workforce in rich countries? A．Younger people are replacing the elderly.
B．Well-educated people tend to work longer.
C．Unemployment rates are rising year after year.
D．People with no college degree do not easily find work.