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

Hey, I am writing this explanation as to make sure I understood well also if it can help then great!

If you just see from a "Finding a Subject" point of view, which I think is the most important part of SC, the subject - "Costly requirements" does not have any "Verb" so this rules our ABC, then D vs E is clear was vs were.

This is actually what I say a dumb-down version of SC where you just find the subject and all the other things follow with it. There can be
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