[单选题]单选题(本题0.5分)某一经济体银行体系的崩溃指(),尤其易发生在金融危机的背景下。
A.货币贬值
B.银行业危机
C.转移事件
D.政治动荡

{{B}}Questions 47 to 51 are based on the following passage.{{/B}}
America is a country that now sits atop the cherished myth that work provides rewards, that working people can support their families. It’s a myth that has become so divorced from reality that it might as well begin with the words "once upon a time". Today 1.6 million New Yorkers suffer from "food insecurity", which is a fancy way of saying they don’t have enough to eat. Some are the people who come in at night and clean the skyscrapers that glitter along-the river. Some pour coffee and take care of the aged parents of the people who live in those buildings. The American Dream for the well-to-do grows from the bowed backs of the working poor, who too often have to choose between groceries and rent.
In a new book called The Betrayal of Work, Beth Shulman says that even in the booming 1990s one out of every four American workers made less than $8.70 an hour, an income equal to