The current economic downturn has significantly reduced advertising income both for business journals as well as general consumer magazines, especially if focusing on technology.
(A) has significantly reduced advertising income both for business journals as well as general consumer magazines, especially if focusing
(B) has significantly reduced advertising income both for business journals and for general consumer magazines, especially those focusing
(C) significantly reduced advertising income for both business journals and for general consumer magazines, especially when focused
(D) reduced both business journals’ and general consumer magazines’ advertising income significantly, especially if focused
(E) reduced advertising income significantly for both business journals, as well as for general consumer magazines, especially those focusing
A is wrong because of unidiomatic usage, both to X and Y, we use either
to both X and Y, or
Both to X and both to YB This choice corrects the idiom error by using Both for X and for Y, those correctly modifies business journal and magazines, since
"those" is a descriptive pronoun it can be used for BJ and mag.
C There is this past tense, waging is used. Generally past tense is used when a time line is given and also meaning of sentence is to show they still have effect of reduced income. Past tense is incorrect. Also especially when focused seems to modify current economy downturn
D same as C past tense, and incorrect modification by especially if
E same idiom error and past tense error