请教各位大N一道语法题

烤G族

The Federal Reserve Board's reduction of interest rate on loans to financial institutions is both an acknowledgement of past economic trends and an effort to influence their future direction.
(A)  reduction of interest rate on loans to financial institutions is both an acknowledgement of past economic trends and an effort
(B)  reduction of interest rates on loans to fenancial institutions is an acknowledgement 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
为何此题选A，而不选C。根据动词>形容词>抽象名词>动名词，我认为应选C。
请哪位大N帮我解决这个问题，不胜感激！

hughlv

C的主谓一致有问题，应该是both acknowledges .. and attempts ...

烤G族

哦 谢谢！