Correct Answer:
C. I said to my sibling, "Do you want to go on a trip?"
The correct answer is I said to my sibling, 'Do you want to go on a trip?'. In converting a sentence from indirect to direct speech, the reporting verb 'asked' changes to 'said to'. The conjunction 'if' changes to a question mark, and the subject 'you' appears in the question. 'Did you want' is past tense but should match the present tense of the original indirect question. 'He you want' is grammatically incorrect, and 'Were you want' is incorrect verb form. Therefore, the correct direct speech is the one with 'Do you want to go on a trip?'