Anonymous I think i've read the sentence one too many times, now I can't tell if "is" or "are" is correct. Is is correct, because: The disciplinarian's ability to keep calm during high stress situations is vital to successfully discipline a child using non-violent methods. Look at the singular subject, it takes is.
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AnonymousI think i've read the sentence one too many times, now I can't tell if "is" or "are" is correct.Is is correct, because: