Students in the metropolitan school district lack math skills to such a large degree as to
make it difficult to absorb them into a city economy becoming ever more dependent on
information-based industries.
(A) lack math skills to such a large degree as to make it difficult to absorb them into a
city economy becoming
(B) lack math skills to a large enough degree that they will be difficult to absorb into a
city's economy that becomes
(C) lack of math skills is so large as to be difficult to absorb them into a city's economy
that becomes
(D) are lacking so much in math skills as to be difficult to absorb into a city's economy
becoming
(E) are so lacking in math skills that it will be difficult to absorb them into a city

OA is E
Question what is wrong with A?