production 与productivity是一样的?如果不一样,区别是什么?

production 与productivity是一样的?如果不一样,区别是什么?
我们采用了他的方法,将生产率提高了百分之二十.
(A) We have adopted his methods,thus improving the production by 20%.
(B) His way of production is accepted by us,so the productivity rose 20%.
(C) We promote the productivity by 20% by adopting his method.
(D) Production was improved by 20% when we had taken his method.
哪个翻译最好