The subject-verb pairing which corrects the grammatical error in the sentence given above is she/practice.
What is a grammatical error?
A grammatical error refers to as the one occurring in the sentence when the use of figures of speech are not done as per the grammatical rules such that they disturb the correct structure of the literature.
The use of subject, 'she' as a pronoun and 'practice' as a verb corrects the grammatical errors in the sentence.
Hence, option C holds true regarding the grammatical error in the sentence. The complete question has been added as an image for better reference.
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