阅读理解。阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。
In business, there's a speed difference：It's the difference between how important a firm's leaders say speed is to their competitive (竞争的) strategy(策略)and how fast the company actually moves.The difference is important regardless of industry and company size. Companies fearful of losing their competitive advantage spend much time and money looking for ways to pick up the speed.
In our study of 343 businesses, the companies that chose to go, go, go to try to gain_an_edge ended up with lower sales and operating incomes than those that paused at key moments to make sure they were on the right track. What's more, the firms that “slowed down to speed up ”improved their top and bottom lines, averaging 40% higher sales and 52% higher operating incomes over a threeyear period.
