in other gmat problem , "they" in choice E is considered redundant and the choice is wrong. but "they" is inferior, but not incorrect.
the pronoun in the second clause can be considered redundant if the first clause is short. if the first clause is long, I think, the pronoun should be inserted.
the pronoun in the second clause can be considered redundant if the first clause is short. if the first clause is long, I think, the pronoun should be inserted.
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