【单选题】

{{I}}{{B}}Questions 27 and 28 are based on the following news.At the end of the news item, you will be given lO seconds to answer the questions. Now listen to the news.{{/I}}{{/B}} This fiscal year’ s deficit is less than GBO predicted in March because ______

A、the tax cut has been much less than originally planned
Bush administration has reduced the federal expenditure
C．a better economy has increased tax income
D．CBO’s estimate in March was based on a wrong assumption