Academicians across the world debates and is preoccupied with the comparative merit of lucid expression as opposed to the ambiguous yet subtle articulation observed in the works of contemporary novelists.
A. debates and is preoccupied with the comparative merit of lucid expression as opposed to the ambiguous yet subtle articulation observed in -- debates and is preoccupied doesn't makes sense
B. have been preoccupied with the ongoing debate over the comparative merits of lucid expressions as opposed to the ambiguous yet subtler articulation observed in . have been preoccupied and observed related to different tenses
C. are preoccupied with the ongoing debate over the comparative merits of lucid expression as opposed to the ambiguous yet subtle articulation observed in -- No parallelism
D. had been ambiguous yet preoccupied with subtly articulating the ongoing debate over the comparative merits of lucid expression opposed to the observed in -- had been is incorrect
E. preoccupied with the ongoing debate over the comparative merits of lucid expression as opposed to the ambiguous yet subtle articulation as observed in -- correct use of 'as' -- Correct option