[单项选择]The National Association of Securities Dealers is investigating whether some brokerage houses are inappropriately pushing individuals to borrow large sums on their houses to invest in the stock market. Can we persuade the association to investigate would-be privatizers of Social Security For it is now apparent that the Bush administration’s privatization proposal will amount to the same thing, borrow trillions, put the money in the stock market and hope. Privatization would begin by diverting payroll taxes, which pay for current Social Security benefits, into personal investment accounts. The government would have to borrow to make up the shortfall. This would sharply increase the government’s debt. "Never mind", privatization advocates say, "in the long run, people would make so much on personal accounts that the government could save money by cutting retirees’ benefits." Even so, if personal investment accounts were invested in Treasury bonds, this whole process would A. it shares similarities with the government’s Social Security policies B. there is no guarantee that it will be profitable in the stock market C. it is not proper for the brokerage houses to persuade people to borrow money D. it is an indication of the Bush administration’s serious concern over the stock market