Sentence Correction (SC) | Re: New hardy varieties of rice show promise of producing high yields with

The meaning issue that stands out the most in the first three choices is "costly requirements" (as opposed to the intended meaning, which is that the agricultural processesthemselves are costly/expensive/resource-intensive), as pointed out above.
This issue should be especially conspicuous because it's the subject of a split at the very beginning of the answer choices.

The other problem
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