OG-260的关于would的解释

dandan74

260. According to some economists, the July decrease in unemployment so that it was the lowest in two years suggests that the gradual improvement in the job market is continuing.
(A)    so that it was the lowest in two years
(B)    so that it was the lowest two-year rate
(C)    to what would be the lowest in two years
(D)    to a two-year low level
(E)    to the lowest level in two years

关于C什莫错OG的解释是：
Choice C improperly uses would be to describe a situation that is presented as a current and known fact.
看不太懂这句话的意思？？

amigo

would是指有可能发生的事，而这句话里的the lowest level 已经是事实了，因此不能用would。