怎么都搞不清的一道阅读题

Seajinking

Which of the following, if true, would most weaken the budget deficit explanation for the discrepancy mentioned in line 27?

A. Research shows that the federal budget deficit has traditionally caused service companies to invest less money in research and development of new technologies.

B. New technologies have been shown to play a significant role in companies that have been able to increase their service productivity.

C. In both service sector and manufacturing, productivity improvements are concentrated in gains in quality.

D. The service sector typically requires larger investments in new technology in order to maintain productivity growth than dose manufacturing

E. High interest rates tend to slow the growth of manufacturing productivity as much as they slow the growth of service-sector productivity in the United States.

原文就不附啦，看过的大神解释一下吧