The question requires identifying and categorizing grammatical errors in given sentences, but the sentences with errors are not provided, making it impossible to give a step-by-step explanation.
It seems like the examples or sentences that require identification and categorization of errors are missing from your question. To provide a step-by-step explanation, I would need the specisentences or examples where errors need to be identified and categorized. Once you provide those sentences, I can help you by pointing out the errors and categorizing them according to the types specified (A, B, C, D).
Feel free to provide the sentences or examples, and I'll be happy to assist you in identifying and categorizing the errors.