题目内容：

For an increasing number of students at American universities, Old is suddenly in. The reason is obvious: the graying of America means jobs, coupled with the aging of the baby-boom generation, a longer life span means that the nation’s elderly population is bound to expand significantly over the next 50 years. By 2050, 25 percent of all Americans will be older than 65, up from 14 percent in 1995.The change poses profound questions for government and society, of course. But it also creates career opportunities in medicine and health professions and in law and business as well. “In addition to the doctors, we’re going to need more sociologists, biologists, urban planners and specialized lawyers,” says Professor Edward Schneider of the University of Southern California’s (USC) School of Gerontology（老年学）.

Lawyers can specialize in “elder law”, which covers everything from trusts and estates to nursing-home abuse and age discrimination. Businessmen see huge opportunities in the elder market because the baby boomers, 74 million strong, are likely to be the wealthiest group of retirees in human history. “Any student who combines an expert knowledge in gerontology with, say, an MBA or law degree will have a license to print money,” one professor says.

Margarite Santos is a 21-year-old senior at USC. She began college as a biology major but found she was “really bored with bacteria.” So she took a class in gerontology and discovered that she liked it. She says, “I did volunteer work in retirement homes and it was very satisfying.”

1.With the aging of America, lawyers can benefit ________.

A. from the adoption of the “elder law”

B. from presenting their professional services to the elderly

C. by enriching their professional knowledge

D. by winning the trust of the elderly to promote their own interests.

2.Who can make big money in the new century according to the passage?

A. Retirees who are business-minded.

B. The volunteer workers in retirement homes.

C. college graduates with an MBA or law degree.

D. Professionals with a good knowledge of gerontology.

3.Why can businessmen gain profit in the emerging elder market?

A. Retirees are more generous in spending money.

B. They can employ more gerontologists.

C. The elderly possess an enormous purchasing power.

D. There are more elderly people working than before.