GMAT Sentence Correction (SC) | If a song is played on the radio often,

OA should be D.
1) "It" can refer only to noun but not the "action/verb" . So options A & B out.
Options C --"increases the chance that the singer will become famous" is result of "A song is played" but not "a practice....." --- So option C out.

Option E--Awkward construction and also verb is missing.

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