令人惊讶的是工厂劳动人员减少了四分之一，产品产量却增长了将近一倍。

A. What is surprising is that with a one fourth reduction in workforce, the production almost doubled.
B. What is surprising is that with a reduction by a factor of 4 in workforce, the production almost doubled.
C. What is surprising is that the number of workers reduced by one fourth, the production increased almost twice.
D. What is surprising is that the number of workers reduced to one fourth, the production increased almost twice.