GMAT Sentence Correction (SC) | The widely accepted big-bang theory holds that the universe

Hi, hope you're doing great

I agree that the best answer is the A because it express the intended meaning of the sentence.

But, the clause *and has been expanding ever since* is an independent clause, and hence we need a subject such as "it" in order to refer to the universe?

Thanks for your kind help

Bests


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