新ＰＲＥＰ－ＳＣ２＃１１２题中答案关于ｉｔ的看法

112. In hoping to restrain economic growth, interest rates were raised by British policymakers, making it more expensive to borrow for businesses and consumers.

Answer E:

(E) Hoping to restrain economic growth, British policymakers raised interest rates, making it more expensive for businesses and consumers to borrow.

在下同意选Ｅ，但是敢问ｉｔ代的是谁？从句意上看应该是interest rates（复数），从单数意义上来看，应该是economic growth，但意思不通。所以ｉｔ只能代interest rates（复数）。是不是改用ｔｈｅｍ更合适？

请教！！

就算是改成them也很奇怪，interest rates只能说low或者high，用expensive来形容rates是不对的。

我同意两楼的意见，it做形式宾语，指to borrow