Sales of organic produce have grown steadily over the last decade, increasing at a rate far exceeding conventional produce.

The correct answer to the question "Sales of organic produce have grown steadily over the last decade, increasing at a rate far exceeding conventional produce." is Option D: increasing at a rate far exceeding that of conventional produce..

The other options — A) increasing at a rate far exceeding conventional produce., B) increasing at a rate that far exceeds conventional produce., C) increasing at a rate far exceeding those of conventional produce. — are incorrect for this GMAT Exam Prep question. As explained above: The original sentence makes an illogical comparison, comparing a 'rate' to 'conventional produce'. To correctly compare rates, a pronoun ('that') must be used to refer back to 'rate,' ensuring a comp…