Sentence Correction (SC) | Re: QOTD: Scientists have recently found evidence that black holes

IMO ans is B.

(A) exist at the core of nearly all galaxiesand the mass of each black hole is proportional toincorrect, need 'that' after 'and' for parallelism

(B) exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that ofcorrect

(C) exist at the core of nearly all galaxies, and that themass of each black hole is proportional toincorrect, illogical comparison between mass and galaxy

(D) exists at the core of nearly all galaxies, and that the
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