OG66

不好意思，这个问题其实在以前的帖子里有人问过，但是却没有明确的答案，希望NN们再帮忙赐教一下。

66. The Federal Reserve Board's reduction of interest rates on loans to financial institutions is both an acknowledgment of past economic trends and an effort to influence their future direction.

(A) reduction of interest rates on loans to financial institutions is both an acknowledgment of past economic trends and an effort

(B) reduction of interest rates on loans to financial institutions is an acknowledgment both of past economic trends as well as an effort

(C) reduction of interest rates on loans to financial institutions both acknowledge past economic trends and attempt

(D) reducing interest rates on loans to financial institutions is an acknowledgment both of past economic trends and an effort

(E) reducing interest rates on loans to financial institutions both acknowledge past economic trends as well as attempt

答案是A,没有什么疑问,主要是从Both上判断的

我想请NN们解答一下，这样的 主谓搭配是否合理，

reduction is accknowledgment and an effort， 降低是一个认识 和 一个努力?

有没有关于抽象词使用的判断方法