GMATPill
The uniformized set of characters, which some historians date in the late Qing dynasty, was the key to the sustainability and prosperity of the Chinese culture over thousands of years.
(A) The uniformized set of characters, which some historians date
(B) The uniformized set of characters, which some historians have thought to occur
(C) Uniformizing the set of characters, dated by some historians at
(D) The uniformization of a set of characters, thought by some historians to have occured
(E) The set of characters' uniformization, dated by some historians to have been
Original Source: Practice Pill Platform Good analysis, guys.
Note that even if you did not know that the idiom "date in" is wrong -- you could have still arrived at the correct answer by examining MEANING.
We all know that the SC is trending towards more meaning-based questions. Not knowing an idiom will most likely not prevent you from getting an answer right. This is a good example.
Step 1) Cut the FLUFF
"The uniformized set of characters.....was the key to the sustainability..of Chinese culture.."
Does it make sense that a set of characters was the key to the sustainability of a culture?
Well, not really - the emphasis needs to be on the word UNIFORMIZED.
It is because these characters were UNIFORMIZED that led to the sustainability of Chinese culture.The phrase "uniformized set of characters" doesn't really capture that. -- so that brings (A) and (B) into question.
Step 2) Examine (C), (D), and (E)
(C) sounds a little awkward - but we know for sure that it's wrong when we see "at in" towards the end as pqhai noted above.
Between (D) and (E) - (D) more clearly communicates the meaning and emphasis on the word uniformization by putting it up front.
(E)'s "the set of characters' uniformization" - is not preferred when compared to the simplicity in (D).