Select the option that can substitute the bracketed word segment correctly and complete the following sentence meaningfully.
They didn’t see you coming here, (is it)?

Correct option is D

The correct substitution of the bracketed word segment is “did they.”
Error identification: The sentence ends with a question tag, which requires the auxiliary verb "did" to match the tense and the pronoun "they" to match the subject "they" in the main clause.
Grammatical Rule used: Question tags are formed by using the auxiliary verb from the main clause and changing the subject to its pronoun form.
Corrected sentence: They didn’t see you coming here, did they?