Recently, an article in the local newspaper criticized the city’s school education board for, first of all, not ensuring full compliance with the recommendations set by the exam committee,
and secondly, their inability to improve the standard of teaching in most schools despite increased funding.
Option Elimination -
A. And secondly, for their inability to improve - SV Issue
B. But secondly, for their inability to improve - SV Issue
C. And second, for not being able to improve - "for not ensuring full compliance..." and "for not being able to improve..." are both prepositional phrases that act adverbially. Ok. Best amongst the lot.
D. And secondly, for their failure in improving - SV Issue.
E. And second, that it was unable to improve - before "and" we have a prepositional phrase and after "and" we have a clause. Not parallel.